Tablet/Desktopmode X1 Yoga Gen 4 Windows 11

I bought a used X1 Yoga Gen 4 from a German refurbished website. The laptop is working perfectly with just one issue. As I flip the screen, to use the laptop as a tablet, the switch mode between tablet mode and desktop mode is pretty inconsistent. I updated several drivers, made a diagnostic run on the Lenovo website and the problem still appears. After a flip, sometimes it gets into tablet mode, but after flipping it back, it stays in the mode, the taskbar is in tablet mode and keyboard and mouse pad is shut off. I need to restart the computer and it works. I tried several software solutions, but from now, nothing worked.

In win 10 there have been a button on the pop up menu, or with win + A, that can toggle between tablet and desktop mode. It seems, that windows 11 deleted this possibility completely. I tried to do this manually with a ai suggested .bat Skript, that toggles between the two modes, or set the status to desktop or, tablet but this had no effect.

Despairing of the solution methods, it could be the sensor... Does anyone else got this problems with win 11 and more importantly, would anyone have a suggestion for a solution? Thank you.