[🐛]: Severe FPS drop (~50%) when opening Diet UI with shaders enabled

[cyb3r1n1t14t1v3]

Confirmation

• I checked that there is no error among the open/closed issues before sending.
• I'm using the latest shader version

Minecraft Version

1.20.x

Graphics Mod

Oculus

Graphics Card (GPU)

NVIDIA

Computer OS

Windows 10

Expected Behavior

The Diet UI should render as a standard GUI overlay without triggering additional shader calculations. FPS should remain stable or drop only negligibly (<5-10%).

Actual Behavior

FPS drops by ~50% upon opening the UI and stays permanently degraded until the client is restarted. The issue triggers after a single open/close cycle and is unaffected by world reloads, server reconnections, or shader resets.

Steps to Reproduce

1. Launch terrafirmagreg-modern v0.12.7 with any shader pack enabled.
2. Open the Diet/Ration interface.
3. Close the interface.
4. Observe that FPS remains halved (~50% lower than baseline).
5. Attempt to recover performance by rejoining the server or reloading shaders → FPS remains degraded.
6. Fully restart the Minecraft client → FPS returns to normal.

Additional Information

• Modpack Version: 0.12.7
• Shader Pack & Loader: TerraFirmaGreg-Shaders-Complementary-3.1.5
• GPU / CPU: GTX 1070 / Ryzen 5 5600
• RAM Allocation: 6 GB
• Java Version: 17.0.15

[Pyritie]

turn your shaders on and off - this seems to be a bug with DH because TACZ guns also have this issue