Please make an apitrace.
You can find a guide on how to do that here:
https://github.com/doitsujin/dxvk/wiki/Using-Apitrace#on-linux
The issue occurs on the main menu, so making the apitrace shouldn't take long at all.
Besides that, can you try #5112. You can find a build of that over here: https://github.com/doitsujin/dxvk/actions/runs/16511753166
Apitrace that reproduces (on amd at least): https://drive.proton.me/urls/WJ3F86Q2P0#doEALhVd4HIl
Can also confirm that with the PR linked it seems fine again.
Closing as it already addressed as mentioned by @K0bin.
It's not yet merged so I'd like to keep it open until that has happened. You can consider it done though.
ge-proton10-10x1 2025-07RADV_DEBUG=nodccx1 2025-07
Just run the game and check collection page or if you switch some backgrounds there should have some artifacts popping up. Adding RADV_DEBUG=nodcc seems to fix the issue as mensioned on issue #2338
Screenshots/video files
Collection Page
Nova Background
Abathur
Alarak
Steps to reproduce
start Starcraft II go to the Collection Page, or go to menu and select one of the above listed backgrounds
Observe flickering on the background video.
OS: Arch Linux
GPU: Navi 32 (XFX AMD Radeon RX 7800XT 16GB Qick 319) [1002:747e]
Kernel version: 6.15.8-arch1-1
Mesa version: Mesa 25.3.0-devel (git-76f76d4f4f)
Desktop environment: i3-wm
DXVK version: dxvk (v2.7-5-g35aa75e68af0927)
Wine/Proton version: GE-Proton10-10