Subtitle Starman.1984.1080p.bluray.x264-[yts.am] Instant

Ensure you aren't using a "DVD" or "Web-DL" subtitle for a "BluRay" file, as the frame rate difference (23.976 fps vs 25 fps) will cause the sync to drift over time.

A user-friendly alternative often preferred for its curated lists and various language options. subtitle Starman.1984.1080p.BluRay.x264-[YTS.AM]

The largest database; search for "Starman 1984" and look for the BluRay or YTS tags. Ensure you aren't using a "DVD" or "Web-DL"