Yes, I've compared PGS images at these timestamps of genuine Blu-ray disc and .mkv rip from MKVToolnix or DVDFab.ArArdin wrote: ↑Sat Mar 05, 2022 11:31 pmThanks for sharing. I doubt if a remux by those tools could cause such issues. Maybe the overlap would actually exist in the source PGS stream itself. If so, the disc would suffer from a major authoring issue.
However, it's not uncommon for a subtitle OCR process to misinterpret accumulative SUP images. Looking at your screenshot, I can imagine lines 37 and 38 being an example of faulty merging of several (on disc, well-authored) lines. Did you compare the actual PGS images at these timestamps?
If rip from tsmuxer and convert to .mkv by MKVToolnix, this error will not exist.