At some point, one of the OSMC updates has introduced a chapter-skip/scrubbing playback sad-face crash - this is present in the June release and May 05-2. Here is a log where I initiate playback of two files that have worked perfectly in the past. The first playback attempt is fine with the chapter skip (even though a chapter skip in the same title earlier in the evening caused a sad face), the second title that is played results in a sad face on the first chapter skip event.
I’ve also seen this issue with scrubbing via the iOS remote.