Please follow the below steps to disable the display adaptor from Lightroom preferences.
> Open Lightroom.
> Click on Lightroom > Preferences (on Mac)
Edit > Preferences (on Windows)
> Click on Performance tab.
> Uncheck Use Display Processor
> Restart Lightroom and check for the issue.
Let me know this helps.
Any idea what the problem is ?
Not without a lot more info.
Is this new behaviour?
Have you changed anything on your machine?
Do you have GPU Support enabled?
What operating system?
How much RAM?