Using FIFO present mode by setting VKD3D_SWAPCHAIN_PRESENT_MODE=FIFO causes these errors to appear in the VKD3D log.
If I use FIFO_LATEST_READY present mode, then I don't get these errors.

If I use VKD3D_SWAPCHAIN_PRESENT_MODE=FIFO and change PROTON_ENABLE_WAYLAND from 1 to 0, I don't get the errors, and the game runs in XWayland.

Before creating the logs I shared here, I copied the VKD3D Proton DLL files from Proton Experimental to Proton CachyOS.

Software information

• Game: Deep Rock Galactic
• Launch options: PROTON_DISCORD_BRIDGE=1 PROTON_DLSS_INDICATOR=0 PROTON_DLSS_UPGRADE=1 PROTON_DXVK_LOWLATENCY=0 PROTON_ENABLE_WAYLAND=1 PROTON_VKD3D_LOWLATENCY=0 PROTON_LOG=1 VKD3D_DEBUG=warn VKD3D_SWAPCHAIN_DEBUG_LATENCY=1 VKD3D_SWAPCHAIN_PRESENT_MODE=FIFO %command%
• Proton: 1784681208 cachyos-11.0-20260703-slr
• DE: KDE Plasma 6.7.90 with commit timing bug fix merged: https://invent.kde.org/plasma/kwin/-/merge_requests/9904

System information

• GPU: NVIDIA GeForce RTX 3070
• Driver: 615.71.09
• Wine version: 11.17-1.1
• VKD3D-Proton version: 3.1.0

Log files

vkd3d.log
steam-548430.log