The new steam client also added a new linux runtime. You can try to disable it by launching steam with a flag. https://store.steampowered.com/news/app/593110?emclan=103582791457287600&emgid=4472730495692571024

Note that this new feature can be turned off globally with "-compat-force-slr off" on ...

ubuntu 24.10. Up to date.
6.11.0-8-generic
No game mods installed

Reporduced on: 2.0.12, 2.0.13, 2.0.14. 2.0.15 (experimental)

Steam version info

Steam Beta Branch: Stable Client
Steam Version: 1730853027
Steam Client Build Date: Tue, Nov 5 11:33 PM UTC -08:00
Steam Web Build Date: Wed, Nov 6 2 ...