HADashboard not loading sensor values

Overnight, HADashboard has stopped loading sensor values.

I note Supervisor has possibly updated automatically (don’t get me started on that bug bear) to supervisor-2021.04.0. Could this be the reason?

AppDaemon 4 0.5.2

On HA Blue OS fully up to date.

Ended up having to restart Host and then clear the cache on all the devices (Windows and Android).

For anyone else that has this issue.