ofxQTKitVideoPlayer loop has hickups

hi of pros,

using ofxQTKitVideoPlayer in loop mode.
movie plays fine, but if it jumps from the end to the startpoint you see a hickup.

i have tested different resolutions (1080p, 720p)
and different codecs (fotojpg, animation, prores )

perhaps someone has solved this problem.
all the best,