its any / leader event, all windows users have to wait 10 minutes for the beacon to swap where as apple tv users see the switch straight away. Occasionally it works but we have never locked down a reason why.
Sand and sequoais is a good starting place.
Just noting this is still an issue. We temporarily lost our ride leader to a fuse at the beginning of the ride. No beacon swap which made it very tricky for me to try to welcome people and explain the ride. Luckily ride leader made it back in, but definitely caused a chaotic start.