Library pictures are shown non corrected

[Kurt M. Wieser]

Hello i correct my pictures in the develop section but in the library the view remains uncorrected,  after i restart LR i see also in the library the pics with the corrections. 

I have a powerfull Windows PC with 16GB RAM / full for 80%.

What can cause this?

[TheDigitalDog]

Try resetting your Lightroom preferences:
https://helpx.adobe.com/lightroom-classic/help/setting-preferences-lightroom.html

Quit Lightroom Classic.
MacOS: Press and hold the Shift + Option keys.
Windows: Press and hold the Shift + Alt keys.
While holding down the keys, launch Lightroom Classic.
When asked, select "Yes".