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OK, basically your drive is having a hard time reading the disk, at an area that would be near the edge. Most likely cause is a blemish or fingerprint, as the more common cause (haze on the disk from storage) would be more wide-spread.

That said, the first thing to try would be a general cleaning ...

Hello, here they are again:

After about an hour, it seems to have fallen into:

I seem to be having an issue with this disc getting stuck on DEBUG: code 1. This is the second copy of this film I've had now, having had the previous copy replaced, and I did other 4k discs either side of getting this error without any issues.
Any ideas?

I've submitted the MKB20_v76_Willy_Wonka_and_the_Chocolate_Factory_5D29 file now.

The latest KEYDB.cfg file contains many entries for this movie, so does copying this file into MakeMKV's data directory (i.e. where MakeMKV also writes its TGZ dump files) and restarting MakeMKV help?


The ...

This is the first time I've had a problem with a disc, I've also got a copy of the KEYDB.cfg file in the .MakeMKV Data directory and still no joy.

I've submitted the MKB20_v76_Willy_Wonka_and_the_Chocolate_Factory_5D29 file now.