Plex losing subtitles when Automatically Adjust Quality is enabled in Plex Web

Does the problem only arise with some videos ?

I found that the first subtitle text in the srt is timed to start at 3 minutes 11 seconds into the video. So this long gap at the front is probably a factor

I did a test with editing the subtitle (making a second srt and editing that) and i changed the first few subtitle text entries to display near the beginning and the problem went away.

So it looks like to do with time period before first subtitle text is to appear.

Do you have any evidence of the issue when the srt file has text that displays in first minute or so?