Playing at half or double speed glitch when I leave a file open

I've noticed lately that if I have a file open and either close my laptop or go into another tab for a while, I'll come back and the piece will be playing either too fast or too slow, at what I'm assuming is half/double speed (I've never counted). The only solution I've found so far is to quit Musescore and open it again, but this is a pain especially when I have several projects open at once.

I was wondering if there's maybe a reset (similar to reset I/O devices for headphone vs. speaker issues?) or whether this is just a current glitch since it hasn't always been like this.

Also, if there isn't an immediate solution, is there a way to restart Musescore and reopen any files automatically, preserving the last session?

(Version 3.6.2)