Motion helper group activated when motion cleared?

[reef-actor]

I have a few zigbee motion sensors in a group.
I have just seen a motion cleared event set the group state to ‘on’. Why would it do this?

[jose1711 (Jose Riha)]

I was seeing the same behaviour - what helped me was to look at the history of the members of the group - somehow the group was not showing all the events. Worth checking maybe.