Ive had this issue a few times recently and it just started happening.
When I import photos that Ive shot with my 135mm lens (not sure why that would matter, but it seems to only happen with the SD card that was in my 5DMK4 with the 135mm on it) only about a quarter of the image previews show up and when I try to preview just one file Lightroom crashes.
This is seriously distressing as im a working photographer with deadlines and need to edit quickly.
The files are not corrupted to the best of my knowledge becuase they appear fine when I view them in my camera.
Could this be a catalog issue?
or is this a software issue related to running lightroom on the M1 mac chip?
I have recently moved the location of my catalog from my external to my Mac minis internal SSD.
Ive tried simply restarting lightroom and that doesnt work either.
It could be a hardware problem with the card. The camera shows the small JPEG previews embedded inside the raws, and typically hardware problems are less likely to affect these JPEG previews than the raw data.
Try copying the problem files from the card to a folder on your desktop and then import the files into LR from there. Do you still encounter problems?
If so, upload one of the problem raws to Dropbox or similar and post the sharing link here. That will let us determine whether the raw photo is corrupted or the issue is specific to your LR configuration.