Hmm, that's a bit worrisome. The Pixel 3 line did have issues with bricking without warning:
https://www.techradar.com/news/goog...domly-bricking-as-hundreds-report-dead-phones. Make sure everything important is being backed up or synced, and keep a backup phone handy.
If you use Google Authenticator, you might want to stop using it on that phone, since if the phone dies suddenly before you can transfer the tokens to another phone, then you might be locked out of certain sites. This happened to me with Box -- I had a Google Authenticator on my old Pixel 3 XL, which died. Box has no other alternative ways to authenticate if you set it up with an authenticator app. When I tried to access my account (which I hadn't used in a few years), they asked me for details like the exact date I last logged in, the exact date I created the account, or the exact name of a file that was saved to it (I had backed up some music files in the past, but music filenames are almost never the same as the actual track name). I could never come up with the exact answer they were looking for, so I was SOL.