So far I have successfully made decrypted backups of around 40 discs. Whenever I create a backup, I always "spot check" a few of the mt2s files, and so far everything has been good. Until today.
I "successfully" backed up a disc, and upon checking two of the m2ts files, the video is breaking up & there is a thick green horizontal line:

 02
02 03
03Makemkv did not display any errors:
Using LibreDrive mode
Backing up disc into folder
Loaded content hash table, will verify integrity of M2TS files.
Backup done
I am using a Verbatim 43888 (Pioneer BDR-UD04).
I tried playing the m2ts files in both Potplayer and VLC Media Player, and both show the same garbled mess.
I checked the physical disc through my Blu-ray player (Panasonic UB820), and playback is flawless (no errors of any kind).
Does anyone know why this is happening?
Thankyou