Videoplayer stuttering during tempo changes

Hey guys, i have had this issue for some time now.
Everytime i have a ritardando or a similar tempo change in the tempo track, the video starts to stutter and drops in framerate significally for the duration of the change which makes it hard, if not impossible to write on cue.
This problem occured on my old system and a friend of mine suffers from it too, so i dont think that it has much to do with my specs.
Anyone having the same problem and/or having ideas for a solution.
Thank you guys already
Greets, Fred