It’s probably already on your radar but I didn’t see a thread* about it so I figured I would mention it.
Seen 502 when trying to load the main page, and on occasion when viewing my feed on mobile web the page would transition to a 503 or 504 error seemingly without my input.
The recent version seems to cause PHP to off into space somewhat frequently. I am working to mitigate it - which will likely, at least for a while, require me to restart the services every few hours until we can figure out what the actual cause is.