Just one other thing as well… This morning the group itself was empty and the group had disappeared altogether from Home Assistant (when I upgraded to 0.86.1 and HA restarted) so the whole geo_location was gone until there was an incident.
This then gave me a nasty red entity error in Lovelace… if the platform is loaded that group [group.all_geolocation_events] should always exist I think so that won’t happen…