Ensure the subtitle is for the 23.976 fps version (standard for BluRay).
The filename you provided refers to the critically acclaimed 2016 South Korean erotic psychological thriller (directed by Park Chan-wook). subtitle The.Handmaiden.2016.720p.BluRay.x264.[...
: A reliable source where you can search for the exact "BluRay x264" string to ensure the timing matches your video file perfectly. Ensure the subtitle is for the 23