Conversation from discrod - https://discord.com/channels/411401661714792449/497481850382450710/836957333354840064

A node's IP address changed, therefore, making the existing TLS cert invalid. This node is now regarded as unverified by the rest of the network because the IP in the cert does not match the node's IP address.

Related to #2536, which had outstanding questions about cert renewal:

May introduce new side-effects: When do certificates need to be recreated or renewed?
IP address changes
Certificate Expiration
How/when to force re-validation and download a fresh copy of a certificate from a peer