Playback from note in score jumps / pauses / hangs
I checked the issues already raised and found some similar problems (e..g. Selecting notes for playback and Playback Issue ) so I added my problem to these, which seems to have been an error - they are both stuck at "needs info".
When trying to play back - for the first time from a particular point - the playback cursor may jump, the playback may hang for a while, one or two notes may be played and the synthesizer sticks on a note for a while ...
First time is critical - once you have played past a point playback from that point is OK.
Closing and reopening the file does not restore the problem - you must close and reopen Musescore to reproduce the problem.
It only occurs when starting playback part way through.
It is not associated with a particular point in score, deleting earlier parts of the score or removing instruments, moves problem further on towards the end.
It varies depending on the soundfont.
Easily reproducible for a particular score although the effect is fairly random, never happens on other of my larger / smaller scores. As yet I have not identified the difference.
Export as mxl and re-import from mxl does not change the behavior.
Reentering the score from scratch does not change the behavior.
Just to confirm, the problem seems to be unchanged in nightly 2019-01-30.
Test procedure and files attached