In my case it crashes reproducible if I connect the USB-C hub that has two external monitors connected (either both via HDMI or 1 HDMI and 1 DisplayPort doesn't really matter).
Note: The USB-C hub has two HDMI ports and one DisplayPort, so I can try all kinds of combinations. It also has two USB-C ports for connecting (both) to the MacBook.
It doesn't crash though if one monitor is connected via the USB-C hub and I connect the other monitor directly to one of the MacBook's ports with a USB-C-to-DisplayPort cable.