i dont have the technical expertise to explain why, only that it happens.
the node operator will experience a sudden inability to access his Grafana RP dashboard (a "page took too long to load" error will appear).
knowing this bit of information may save some hassle from node operators using Tali scale (especially novice ones such as myself) and will lessen the need for discord support engagement.
i suggest adding it the guides where taliscale setup is explained and maybe also on the setting up grafana page, you can add a link to taliscale update FAQ "https://tailscale.com/kb/1067/update?q=update"
many thanks