Just an update about this --

I have a reddit thread going as well for the exact same issue that's gotten a little traction, and it got a reply from one of Larian's Community Strategists. If anyone here is interested, here's how you can send your info to Larian so they can get more information and hopefully fix this one:

Hey everyone,

Larian Studios' Sr. Community Strategist here!

The team are eager to look into this issue and would like a few individuals to send in their savegames so it can be investigated further.

If you're experiencing the issue on this thread, please follow the steps in this link to obtain your savegame file, and email it to community@larian.com.

Thank you in advance!