Pixel 3a XL repeatedly crashes and reboots when connecting to a specific Wi-Fi network
This is a known, supposedly fixed but not yet pushed into production issue for Wi-Fi networks utilizing 802.11k:
https://issuetracker.google.com/issues/144381412
See also:
https://www.reddit.com/r/Pixel3/comments/f7mych/reboot_when_connecting_to_wifi/
It has been more than a year and still unresolved in end user devices. I don't understand why it is taking this long especially considering:

That they have supposedly fixed it in the code.
How widespread this must be, as all devices are affected (even if most people may not realize it has to do with Wi-Fi, it took me a while to connect the dots). I am personally experiencing the same on a Pixel 3.

Please upvote and comment on the Google Bug tracker link above so Google can finally take care of this.