1 person found this helpful
Try turning off the option to use the GPU on the performance tab of the LR Preferences.
What OS are you using and what exact version of LR. Please state the exact version of both OS and LR not just the Latest versions.
What happens if you Roll the cursor over those images?
I think this was caused by the same thing as my disappearing catalog. Oh dear!
No I've found out that it's a completely unrelated issue. I have been syncing my catalog to the cloud and it got unsynced (so it disappeared from my local drive). Hence the issues. Thanks for getting back to me anyway.