BUG with bookmark and resume position

Hello, there’s a bug when I add a bookmark: I loose the resume position.
Say I watch a movie. At the 20th minute I stop the movie.
Next day I resume the movie from the last position, everything works well.
Then at the 40th minute I add a bookmark, and then I keep playing the movie until 1 hour and 10 minutes. Then I stop the movie again.
Next day I want to resume the movie from the last position: it doesn’t work anymore, the movie will start from the begining. The bookmark does work, but the resume position doesn’t.
So I delete all bookmarks, reset the resume position, and start the playback again. I go to 1 hour and 10 minutes inside the video. Then stop the playback, then I want to resume the movie from the last position: it still doesn’t work, the movie will start from the begining.
The ONLY WAY to make the resume position to work again is by RENAMING the file, then clean the library, then it will work.
So I guess it is a bug…
-G