why does the screen disapper?

[Steve Zeeeee]

all too often, this happens, main screen missing: LR 11.14.1

[TheDigitalDog · Accepted solution]

If not, try disabling GPU in preferences, any better? 

If not, try resetting your Lightroom preferences:
https://helpx.adobe.com/lightroom-classic/help/setting-preferences-lightroom.html
Also see: https://community.adobe.com/t5/lightroom-classic-discussions/important-steps-for-manually-resetting-...

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". 

[Steve Zeeeee]

that works, but any restart works; i just dont want to restart.