CS2 Stuck on Valve Logo on startup 545 beta branch

For me only nested gamescope 3.12.5 doesn’t launch in fullscreen. Gamescope 3.12.5 in a separate session starts fine. Gamescope after 3.12.5 is completely borked but you should already know about it: Latest Gamescope breaks NVIDIA · Issue #987 · ValveSoftware/gamescope · GitHub