This indicates the original digital release had a technical error (such as out-of-sync audio or a glitch) and has been corrected and re-released by the distributor or group.
The text you provided is the technical filename for a digital copy of the . subtitle Separation.2021.REPACK.1080p.WEB-DL.DD...
This is a high-definition (Full HD) version sourced directly from a streaming service (like Amazon or iTunes) rather than being compressed from a Blu-ray. This indicates the original digital release had a
Separation (2021) - YouTube. This content can't be played on your mobile browser. Get the YouTube app to start watching. YouTube·YouTube Movies subtitle Separation.2021.REPACK.1080p.WEB-DL.DD...
Based on the filename structure, here are the details of this specific version: