Playback on iPad OSx 14.4.2 does not work after uploading online.

Kietzer_Sites_14-29.mscz Hello everybody,

I´ve transscripted a very good Clarinet-School into Musescore Version 3.6.2.548 on my Mac.
This works all fine and the replay on the Mac is spot on.
After saving it online and checking the file on my iPad Pro OS x 14.4.2 the music is all there but won´t replay
right. When playing the blue marker on a certain note and start the replay starts a few bars before the marked note and at times Stopps for a while.
As I´d like to publish this Clarinet School to the benefit of many Clarinetist out there I´d be glad, if someone could tell me what I´ve to do in order to sie it up right. Thank you so much - Elmar