HLS (chromecast, roku), and burned subtitles issue

[odin]

I think I found a bug with the HLS format and using Burn Subtitles into video, I don't have these devices but I do have a hdmi dongle that works good with the HLS format it allows me to free seek without full encoding the file, however it seems to have an issue with Burned subtitles, when I seek to a position in the movie the subtitles get 'reset' to the beginning and no longer sync with the movie, (ie seek to 30 minutes into the movie, the burned subtitle will reset to first lines.)

The expected behavior would be, is when you seek it should encode the correct position of the subtitle with that timeline in the movie.

I hope this makes sense, and is fixable

Thanks