Legion Go Bazzite 3.0.0 Screen Refresh Rate and FPS control

“Screen Refresh Rate and FPS control - unified refresh rate + FPS slider now works perfectly on latest bazzite stable”

I have carried out a complete reinstallation but this slider does not work for me. When I adjust it, the screen briefly goes black and I see a change in the FPS counter, which then returns to its original value. When I am in a game menu, the FPS counter is in the high three-digit range even though the slider is at 60FPS. If I set it to 30FPS, nothing changes either.
I only selected the Decky Loader and Brave during installation and the rest is standard.

Is it just me with the problem?

Regards

Edit: The bios is the latest

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