Crashing in towns since yesterday (sep 7th).

Had this at 3.22 launch, then it went away, I think with the first micropatch. Yesterday it came back.

CPU: AMD Ryzen 5 2600
GPU: GTX 1060 6GB
RAM: 16GB
OS: W10
Both OS and game (with its cache) are installed in separate SSDs, which alleviated stutter issues in the past. Said issues are also back.

It can crash seconds after I portal into a town, or it can take a couple minutes. Happens regardless of whether I'm tabbed out or actually playing. It doesn't crash anywhere else, only in towns.

Small update: logged into a dead league (standard ssf) and idled for a while in an empty town. No crashes. I wonder if one of the new mystery MTXs is causing issues for certain players.