I suggest looking for the phrase "Your node is still considered to be online but encountered an error" in your logs. If that line does not appear in the logs since you started running with 1.90.2, then you may be seeing a dashboard bug, corroborated by Not so... QUIC... Correctly "Misconfigured".
If you do find that phrase, it should have an error message attached describing why the server failed to contact your node with QUIC.