[CRIT] 6-man simultaneous Buffer Underflow crash (missing animation)

Description:
A party of 6 players (using 3 PCs, each running 2 game clients) all crash simultaneously with a "Buffer Underflow" error when encountering certain fire-themed monsters in maps. The crash is 100% reproducible for everyone in the party at the same moment.

Steps to Reproduce:

1. Form a party of 6 players on 3 computers (2 clients per PC).
2. Enter a map containing monsters that cast the skill BarrelCastGroundEffectBurningGroundSmall (e.g., near the boss "烈火之手．尼亞薩" or similar flame-themed enemies).
3. Fight the monsters and wait until the ground fire effect is cast.
4. Within seconds, every player's client freezes and displays "Buffer Underflow", then crashes to desktop simultaneously.

Expected Result:
Players can fight normally without crashing.

Actual Result:
All 6 clients crash at the same moment with the error [EXCEPTION] Buffer Underflow.

Critical Log Snippets (from two different clients):

```
[CRIT Client 20192] Skill BarrelCastGroundEffectBurningGroundSmall has neither a primary animation row set nor overrides GetAnimation
[CRIT Client 20192] [EXCEPTION] Buffer Underflow (Error fingerprint: 84b56f5a)

[CRIT Client 30692] Skill BarrelCastGroundEffectBurningGroundSmall has neither a primary animation row set nor overrides GetAnimation
[CRIT Client 30692] [EXCEPTION] Buffer Underflow (Error fingerprint: 84b56f5a)
```

The exact same CRIT error appears in every crashing client's log before the EXCEPTION.

What We Tried (None of These Prevented the Crash):

· Master Volume = 0 (completely muted)
· Graphics settings set to minimum (texture, shadow, effects quality, resolution)
· Switched between Lockstep and Predictive networking modes
· Changed graphics API (Vulkan, DirectX 11, DirectX 12)
· Used different graphics cards and driver versions

Additional Information:

· The crash happens for all 6 players at the exact same game event.
· The error fingerprint 84b56f5a is consistent across all affected clients.
· Our analysis suggests the skill BarrelCastGroundEffectBurningGroundSmall has missing animation data (no primary animation row, no GetAnimation override), which causes the animation buffer to underflow and crashes the client.
· We are willing to provide the full Client.txt log files if needed (please let us know how to upload them).

Game Version: [POE2 0.5.0b]
Platform: PC (Windows)
Graphics API: Vulkan (also tested DX11/DX12)

File shared via cloud drive: Client.7z
Link: https://pan.baidu.com/s/1s6afNvySFmt1byX6PDfSrw Extraction code: k2dy