# LabyMod Discord Bug Report
**Channels:** #support, #general, #discussions
**Period:** 2026-06-17 09:43 – 2026-07-01 08:28 (UTC, ~2 weeks since last report)
**Messages analyzed:** 1345 new (4724 in archive) | **Incidents:** 15 active this window (+ 8 newly fixed)
**Changelogs checked:** Launcher 3.0.10, LabyMod 4 4.5.13, LabyFabric 2.1.4, LabyForge 2.0.7

---

## 🔴 Critical

### [CRIT-001] WorldCup 2026 addon freezes + crashes the game on Linux (still open)
- **Category:** Addon
- **(Crash)logs:** https://paste.labymod.net/raw/alewuquqezutedidopiy · https://paste.labymod.net/raw/wivupumogazizorizopa
- **Message Links:** https://discord.com/channels/260471731809026048/260478719695519746/1516887957246574622
- **Occurrences:** 6 (2 new since last run)
- **OS:** Linux (CachyOS, Fedora, NixOS) · **MC Version:** 26.1.2 / 4.5.8
- **Affected users:** @Calvin (ToastXmoon), @dark1zin (+ @Niika, @EinfxchWolf, @ByteCodes_ prior)
- **Linked Ideas:** [#21026 — Game freeze and crash with WorldCup 2026 Addon [OPEN]](https://laby.net/ideas/21026)
- **Status:** open — carried over, still unresolved

**Log analysis:** WorldCup addon loads, then `SLF4J(E): A service provider failed to instantiate`; game freezes ~2s after joining and crashes. Reproduces only on Linux (Windows users with the addon don't crash). @Calvin was on the current launcher 3.0.10; @dark1zin installed via nixpkgs (unofficial → staff deferred). QA re-notified.

**Hypothesis:** Linux-only addon-init/native-media crash. Distinct from CRIT-002 below (different stack). Needs a dev-side Linux repro.

### [CRIT-002] WorldCup addon: 'Pushed too many matrices' crash when the stream screen renders 🆕
- **Category:** Addon
- **(Crash)logs:** https://paste.labymod.net/raw/ronigogimuvacekuvona
- **Message Links:** https://discord.com/channels/260471731809026048/260478719695519746/1519795648382242966
- **Occurrences:** 2
- **OS:** Windows (and Linux) · **MC Version:** 1.21.x
- **Affected users:** @|- 𝐉𝐨𝐉𝐨 -|, @Geldi
- **Linked Ideas:** [#21026 [OPEN]](https://laby.net/ideas/21026) (may share)
- **Status:** open

**Log analysis:**
```
java.lang.IllegalStateException: Pushed too many matrices
  at net.labymod.core.laby3d.renderer.listener.LevelRendererListener#dispatchWorldSnapshot
     by labymod (expected index: 0, actual index: 3)
  at StackCheckingEvent.postInvoke → RenderWorldEventCaller.callPost
```
The game crashes the **instant** the WorldCup stream screen renders — a render matrix-stack push/pop imbalance in LabyMod's laby3d LevelRendererListener. Reproduces completely vanilla + only the addon (@JoJo), so it's **cross-platform** and distinct from the Linux init crash.

**Hypothesis:** The addon pushes matrices during the world snapshot that are never popped. A guard/pop fix in the addon's render path should resolve it.

---

## 🟠 High

### [HIGH-001] Deleting an imported Modrinth instance wiped the whole .minecraft/saves folder 🆕
- **Category:** Launcher
- **(Crash)logs:** none (data-loss report)
- **Message Links:** https://discord.com/channels/260471731809026048/260478719695519746/1518999197464924262
- **Occurrences:** 1 · **OS:** Windows
- **Affected users:** @Nobody
- **Status:** needs-info — **permanent data loss**, not sent to recycle bin

**User reports:**
> "Als ich die Instanz später gelöscht habe, wurde jedoch offenbar auch der gesamte .minecraft/saves-Ordner gelöscht. […] der Ordner nicht im Papierkorb." — @Nobody, 2026-06-23

Imported a Modrinth instance, granted it access to the real `.minecraft/saves`, then deleting the instance deleted the entire saves folder permanently. Same family as the 3.0.6-fixed "shared content deleted when removing a shared-directory instance," but here it wiped real worlds via the manually-linked path. **Instance deletion must never recurse into user-linked external dirs, and should use the recycle bin.** Gamerboy flagged it as a bug.

### [HIGH-002] Launcher fails to start silently (no window, not in task manager)
- **Category:** Launcher
- **(Crash)logs:** attachments/1519070185204617367_message.txt (`invalid_grant` refresh token + dbus)
- **Message Links:** https://discord.com/channels/260471731809026048/260478719695519746/1519872380393099435
- **Occurrences:** 10 total (3 new since last run)
- **OS:** Windows · **Affected users:** @Simon, @MYNTAX, @Erika_bv (+ prior)
- **Status:** open — still recurring on 3.0.10

Still the top recurring launcher issue: @Simon ("louncher öffnet sich garnet mehr"), @MYNTAX (desktop shortcut does nothing), @Erika_bv (resolved after a PC restart). @MYNTAX additionally reports the Fabric mod folders vanishing after closing MC — see the overlay regression in Apparently Fixed. Capture `labymodlauncher-install.log` + `-error.log` from a fresh failure.

### [HIGH-003] Direct LabyMod crash on start+join 🆕
- **Category:** Client
- **(Crash)logs:** attached to idea #21144
- **Message Links:** https://discord.com/channels/260471731809026048/260478719695519746/1519966247415185539
- **Occurrences:** 1 · **Affected users:** @AzureDawn25270
- **Linked Ideas:** [#21144 — Direct LabyMod crash [OPEN]](https://laby.net/ideas/21144)
- **Status:** open

> "I can no longer start LabyMod and join a server without the game crashing immediately." — @AzureDawn25270, 2026-06-26

Single reporter but tracked as idea #21144 (OPEN) — flagged so it isn't lost; pull the crash log from the idea to triage.

---

## 🟡 Medium

### [MED-001] Cosmetics render as plain white layers with shaders (Iris) — still open
- **Category:** Client · **Component:** Rendering
- **Message Links:** https://discord.com/channels/260471731809026048/260478719695519746/1518018420589985854
- **Occurrences:** 5 (1 new) · **MC Version:** 26.1.2 / 1.21.x
- **Affected users:** @Slowlex (+ @Cxrni, @byjonas, @benny, @aklokin prior)
- **Linked Ideas:** [#19863 — Cosmetics don't work with shaders [OPEN]](https://laby.net/ideas/19863)
- **Status:** open — staff note it's hard to fix generically ("tausende Shader")

Carried over; still hitting 26.1.2 users. Cosmetics lose textures and render solid white with Iris/Sodium shaders.

### [MED-002] One unresolved Fabric mod dependency silently disables ALL mods
- **Category:** Client · **Component:** LabyFabric
- **(Crash)logs:** https://paste.labymod.net/raw/orovozogagiqekotobon · https://paste.labymod.net/raw/uvocohirikofuqamixes
- **Message Links:** https://discord.com/channels/260471731809026048/260478719695519746/1519065669193171154
- **Occurrences:** 6 (3 new) · **MC Version:** 1.20.6 / 1.21.x / 26.1
- **Affected users:** @SwagLights ・ユウナ, @Troya0023, @simonpro10 (+ prior)
- **Status:** open (actionable UX)

Still the most common "all my mods stopped working" pattern. One missing/conflicting dep (SwagLights: forgeconfigapiport / malilib / minihud / ukulib chain; simonpro10: clientcommands, jei) aborts the whole Fabric mod load with no clear in-launcher indication of the culprit. Surfacing the offending mod/dependency in the launcher UI would cut a large class of tickets. *(The ModMenu-on-26.2 variant is now fixed — see Apparently Fixed.)*

### [MED-003] Severe FPS drops + chat/menu lag on 1.21.11 (Laby-only) 🆕
- **Category:** Client · **Component:** Performance
- **(Crash)logs:** https://paste.labymod.net/raw/pudazumofojahebafaqi · https://paste.labymod.net/raw/bawupahakoyewodumani
- **Message Links:** https://discord.com/channels/260471731809026048/260478719695519746/1520578114458226878
- **Occurrences:** 2 (same user, well-documented) · **OS:** Windows (GTX 1660S, Ryzen 5 7600X3D) · **MC Version:** 1.21.11 / 4.5.12
- **Affected users:** @Leon
- **Status:** open

Two threads: (1) installing Laby Waypoint/Minimap addons caused FPS drops on laby.net that vanished after uninstalling; (2) drops persist **without** addons/cosmetics whenever FPS runs high (~160), but are smooth capped ≤140 — GPU only ~30% utilized. Points at frame-pacing/vsync in LabyMod's render loop rather than GPU load. Workaround: cap FPS ≤140.

### [MED-004] WorldCup addon: missing broadcasters for many countries + ARD no-sound
- **Category:** Addon · **Message Links:** https://discord.com/channels/260471731809026048/260478719695519746/1518330741468037180
- **Occurrences:** 6+ (2 new) · **Affected users:** @montyaxx, @shiro, @Jürgen, @SachikoSun (+ prior)
- **Status:** open (mostly coverage requests)

Ongoing coverage gap: only a small, mostly-German broadcaster set, so Brazil (CazéTV/YouTube), Austria (ORF), etc. get "no channel found"; streams must be free/legal/public and VLC-playable (DRM streams can't be added). The genuine bug in the cluster remains **ARD no-sound** (video plays, audio silent, output-device dependent).

---

## 🟢 Low

### [LOW-001] Laby Minimap shows only an outline; Laby Waypoints can't be deleted 🆕
- **Category:** Client · **Component:** Rendering · **Message Links:** https://discord.com/channels/260471731809026048/260478719695519746/1518976220912550070
- **Occurrences:** 2 · **Affected users:** @Robertus (waypoints), @mcsramas (minimap) · **Status:** open

Minimap draws its border but no map content (singleplayer); Waypoints become undeletable/uneditable and persist when the addon is disabled.

### [LOW-002] Motion blur only applies in third person (F5), not first person 🆕
- **Category:** Client · **Component:** Rendering · **Message Links:** https://discord.com/channels/260471731809026048/260478719695519746/1520294787192717383
- **Occurrences:** 2 · **Affected users:** @N A C H O, @hyper⁸ · **Status:** open

Motion blur has no effect in first-person; only visible in F5. Likely the blur post-effect isn't applied to the first-person pass.

### [LOW-003] 1.7 block-hit / sneak animation toggles have no effect 🆕
- **Category:** Client · **Component:** Mechanics · **Message Links:** https://discord.com/channels/260471731809026048/260478719695519746/1516755373749571715
- **Occurrences:** 2 · **Affected users:** @Tiramisu, @Txslx · **Status:** needs-info

Toggling the 1.7 block-hit animation changes nothing; 1.7 sneak looks identical to 1.8 (@Txslx narrowed it to Hypixel only → possible server-context gate).

### [LOW-004] labymodlauncher-install.log keeps appearing in Downloads (no opt-out) 🆕
- **Category:** Launcher · **Message Links:** https://discord.com/channels/260471731809026048/260478719695519746/1519609904548020324
- **Occurrences:** 3 · **Affected users:** @Idrop200points, @Treggalin, @zlxne_ · **Status:** open

The launcher dumps a diagnostic `labymodlauncher-install.log` into Downloads every start with no way to disable it. Northernside intends to remove it once the underlying Windows install issue is confirmed gone — still pending, users keep asking.

### [LOW-005] AFK at a cobble generator with F3+T auto-mines the obsidian behind it 🆕
- **Category:** Client · **Message Links:** https://discord.com/channels/260471731809026048/260478719695519746/1517990622726721557
- **Occurrences:** 1 (twice) · **Affected users:** @wolfi · **Status:** needs-info

Only reproduces under LabyMod, not vanilla — suggests a LabyMod feature holding the attack input after an F3+T resource reload. Needs a repro video.

---

## ✅ Apparently Fixed

Issues from this window (or carried over) that releases/staff appear to have resolved. Verify before closing.

- **Cosmetic render crash — ConcurrentModificationException / match-overview** (prev. report HIGH-003 / @zuna, @𝓜𝓪𝓽𝓽𝓲𝓶𝓾𝓼𝓼): fixed in **LabyMod 4 4.5.13** ("Crashes when match overview renders after a match ends", [IDEA-21106 DONE](https://laby.net/ideas/21106)) — the match-overview render path is the many-cosmetics-at-once scenario.
- **Emotes / very detailed cosmetics not showing when worn** (@Yoshimitsu, @Dark_Mandalor): fixed in **4.5.11** ("Very detailed cosmetics don't appear when worn", [IDEA-21113 DONE](https://laby.net/ideas/21113); emoteloader [IDEA-21114] marked duplicate). **Confirmed** by Dark_Mandalor: "danke euch is fixed ^^ top einwandfrei."
- **ModMenu crash on startup (26.2 Fabric)** (@Goblin Monster Hunter): fixed in **4.5.11** ("ModMenu crashes on startup: bundled MixinExtras too old", IDEA-21101). Christian confirmed a next-release fix.
- **Custom name tags not rendering on 26.2** — **4.5.11** ([IDEA-21055 DONE](https://laby.net/ideas/21055)).
- **CustomBlockOverlay fails to render** — **4.5.11** ([IDEA-21092 DONE](https://laby.net/ideas/21092)).
- **Screenshot browser empty on 1.20.4 / 1.21.4** (@Noah, @Dark_Mandalor): Christian confirmed a next-update fix (cf. 4.5.10 "Screenshots not visible: NPE in ScreenshotBrowser", IDEA-21043). Verify on those versions.
- **MC 26.2 Fabric support** — **LabyFabric 2.1.4** ("Added support for 26.2") + LM4 4.5.9.
- **Persistent screen blur/flicker while moving, FPS drops from repeated spaces in search, lootbox shaking, Football-Hunt button overlap** — **4.5.11** (IDEA-21084/21050/21112/21079).

⚠️ **Watch for regression:** **Per-instance overlay hijacks schematics/mod folders** (previously fixed in 3.0.7/3.0.8) — @Dark_Mandalor (06-23) reports schematics saving to the instance overlay folder again, and @MYNTAX (06-26) reports Fabric mod folders vanishing after closing MC. Re-opened as **regressed** in the DB; the overlay removal may not cover all content types / instance kinds.

---

*Excluded as external / not-a-bug / transient:*
- **Mojang/Xbox global auth outage (06-29, ~3h):** mass login/"Invalid session" failures — Northernside pinned it as a Mojang PlayFab issue, not LabyMod; resolved same day. Many reports (Wacros, KiaBruno, Recha_k, OgiatFS, …) belong to this.
- **Minecraft "Sending chat messages is not allowed"** (@Shiino, @VoidMonarch): Mojang's account-privacy/chat rollout (Microsoft/Xbox family settings, u18 accounts) — not LabyMod. Minor UX note: vanilla shows the help link, LabyMod doesn't yet.
- **laby.net server "jailed/blacklisted" complaints** (multiple Arab-region users): server moderation/version-gate matter, not a client bug.
- **Standalone Forge 1.12.2 / 1.8.9 "crashes" when launched without LabyMod features** (@NoxVitus, @Txslx): by design — Forge-with-LabyMod is only supported on 1.8.9; @Txslx's issue was creating the wrong instance type (resolved).
- **LabyMod 3 unsupported / 403 install / OptiFine on LM3 / cracked accounts**, cosmetic-pricing & LabyCoin/gift-code questions, streak/ban appeals, translator applications, individual user-side mod crashes (clientcommands, jei, embeddium, crash_assistant, Flashback, explosiveenhancement — each resolved by removing the mod).