Piece plays through 2nd bar of [C2] then crash - connected to odd tie behaviour?

Reported here: https://musescore.org/en/node/303250

Body of that report:
I want to hear what I have written in the piano part to check for accidentals.

Go to piano part, press space bar, piece "plays" to end of bar 30,cursor and sound stop, program crashes.

Please see attached:

Also task manager snapshot.
NOT FOUND: Task Mgr in MS crash.PNG

The high cpu numbers for the "not responding" MS are not static but vary minimally. They seem suspicious but I am limited in my knowledge about that.

Thanks for any help.