mp4, m4v missing thumbnails OS Monterey
Since upgrading to Monterey my mp4, m4v files are missing their thumbnails.
I have many movies that i used Subler to add a cover photo and these all worked before and were visible in Big Sur
i have tried the removal of com.apple.finder.plist and forced finder to relunvh and this does not work.
Here lies the problem.
If i reboot the iMac the folders all show the thumbnails correctly, but if i leave the computer for a few hours and return and wake it from sleep the thumbnails are all gone.
if i transfer a mp4 from something like my GoPro the thumbnail does not even show the preview in the thumbnail. just a generic white thumbnail. But again if i reboot it is fixed, but once the computer is woken from sleep they are again gone!! This only happens after a few hours of sleep and not if i let it sleep and wake the mac after a few minutes.
Can anyone help