Are these store purchased, studio pressed Blu-ray movies - or are you talking about burned discs you make yourself? Maybe I'm misinterpreting the word "transfers".
Can't say I have an answer, I'm just asking questions to get more info in case myself or others can then better help or give suggestions.
Since your location says The Dutch Mountains, any chance it could be related to NTSC vs PAL discs (knowing some players can play both, but have to do some type of on-the-fly "conversion" to display in your location's default format).
If its related to trying to change the 24 frames per second to your local display refresh, that I could see being an issue at the beginning/end of scenes. Maybe just changing around the output from 50/60hz to 24hz would clear it up?
Since you mentioned you've seen different transfers of the same movies, could you give a specific example of a movie and which versions are good and which causes problems? Maybe the specs of the different versions will point to a difference?
And lastly, knowing which player you use and which television, type of connection (HDMI vs component) may also help someone chime in with ideas.