Minecraft Bedrock 1.26.60.5 crashes in nvwgf2umx.dll when enabling RTX resource packs

Summary

Minecraft Bedrock 1.26.60.5 consistently crashes when loading an existing world with an RTX resource pack enabled. The world loads and runs normally when all RTX/resource packs are disabled.

RTX works when creating a new world. I can create and load new worlds using both VanillaRTX and RealisticRTX. The crash therefore appears to be triggered by enabling RTX on this particular existing world rather than RTX being completely unavailable on the system.

Steps to reproduce

1. Disable all global resource packs.

2. Launch Minecraft Bedrock.

3. Load the affected existing world without an RTX resource pack.

4. The world loads and runs normally.

5. Save and exit the world.

6. Close and relaunch Minecraft.

7. Enable an RTX resource pack.

8. Attempt to load the same existing world.

9. Minecraft crashes during world launch.

Expected result

The existing world loads successfully with RTX enabled.

Actual result

Minecraft crashes while loading the world.

Additional testing

• The affected world works with all RTX/resource packs disabled.

• New worlds work with VanillaRTX enabled.

• New worlds work with RealisticRTX enabled.

• The existing world crashes with RTX enabled.

• VanillaRTX previously worked on this system.

• The issue occurred with the previous NVIDIA driver.

• I updated the NVIDIA driver, but the same crash continues with the new driver.

• Repeated crashes produce the same faulting module, exception code, and fault offset.