Several bugs, e.g., hidden instruments still playing, export to wav doesn't work

I've noticed several glitches since the latest update.

Instruments are are hidden still play and have to be separately muted.
When exporting to wav file, the export happens very quickly (few seconds) and the output sounds static-y and broken. This makes it completely unusable for exporting right now.

I've noticed other small things. When trying to select a tie, the program immediately crashes. When playing a score (in horizontal view), it sometimes gets laggy and stays at the end of the window, jumping at each note rather than moving the whole page forward.

It's a bummer because I had cleared my whole weekend to work on music and I can't really do anything right now without it crashing on me.