Steam Beta client is out as well and it appears they've finally addressed the buggy "Processing Vulkan Shaders" dialog.
From the release notes:
Linux
From the release notes:
Linux
- Improved performance of processing incremental Vulkan shader database updates
- Fixed several issues around skipped Vulkan shader processing continuing in the background after a game has started
- Disabled shader processing on NVIDIA while driver issues are being looked into
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