Somewhere early. It’s only off by a frame, so it makes sense that you would have not noticed it. It can be remuxed with a sync offset to fix.
Any instructions on how to do so? I mean obviously it’s so small that I never noticed it before and probably never could, but simply knowing it’s there now is going to bother my mildly OCD brain regardless.
http://originaltrilogy.com/post/id/725222
For ESB, just add 42ms delay in Mkvmerge for all audio tracks.