Search specifically for the "DRONES" tag to ensure perfect sync. Subscene: Look for BluRay-sourced SRT files.
You can find or verify compatible subtitle files on these platforms: subtitle Darkest.Hour.2017.1080p.BluRay.x264-DR...
Darkest.Hour.2017.1080p.BluRay.x265.HEVC.10bit.AAC.7.1-Tigole (often uses the same master timing) Common Resources Search specifically for the "DRONES" tag to ensure