"My Stuff" (2013) fails to save even though the content seems to all be present

[dododge]

This is a Finnish movie, distributed by Blue Water Content. The disc is burn-on-demand. The case has English writing but the disc itself has some German on it, which is a bit odd.

If I open it in makemkv I see a single 7GB track. All attempts to save it to an mkv file fail at the end. I tried making a BDMV-style backup instead, and the m2ts file likewise fails at the end:

AACS directory not present, assuming unencrypted disc
Content hash table missing, unable to verify integrity of M2TS files.
Error 'Internal error - Operation result is incorrect (232)' occurred while reading '/BDMV/STREAM/00001.m2ts' at offset '7516176384'

So it looks like a dirty/bad disc, but here's the thing: I cleaned it just in case, and got a 100% read (no I/O errors) of the disc to an ISO file with "dd". vlc can open that ISO file and play the movie all the way to the end. But if I open the ISO file with makemkv it's the same as before, and when it gets to the end of saving the mkv file it decides something is wrong and deletes it.

I tried making a hard link to the m2ts file while it was writing a BDMV backup, so that I'd still have a copy after makemkv deletes it. That "deleted" file seems to play fine, except it's missing the last 3-4 minutes. I assume the last chunk of the file was still buffered in memory and didn't get flushed when makemkv gave up. I double-checked that vlc can see those last few minutes in the ISO and play them back cleanly.

I suspect this is just some mastering issue from a small label (it wouldn't be the first time I've run into that), in which case a replacement disc would presumably have the same problem. If I could convince makemkv to ignore the error and just write the m2ts data anyway, that would probably be sufficient to get it to work, but I'm not sure there's any way to do that?