Since the update, I'm having consistent problems with parts not being heard when they're playing. I can see the meters jumping on the Mixer, on solo and melody parts, and all the other parts play just fine, but there is just silence on many of these parts. This JUST started with the update.

Here's a short video, demonstrating the issue: https://youtu.be/BkEXLSCI_oU

Hi

I notice from your video that the parts you mention are midi
So do you have a midi synth or vst /dxi set in your midi settings ,
If not then try using at least the coyote wave table
And tick box use vst i/ dxi synth .
See pic
Mike

Good call. I was assuming these were RealTracks. Let me go look. I'm not sure I even setup the MIDI synth this installation because I almost exclusively RealTracks! Thanks for the direction.