I think the title says it all. If not, refer to my in depth explanation over here... https://forums.plex.tv/topic/116448-cinematic-trailers-only-work-if-a-movie-has-not-been-previously-stopped-mid-way-through/
Yep, seconded. Feels like a bug.
2021 clean-up: appears to have been fixed (bug, no feature suggestion)
