@NHN-Tapo There are no errors at all, they just stop working. If I turn them on & off again they may work for a day or 2 then stop again . Everything you've suggested I've already checked multiple...

Set 5 smart actions for arrive & leave home, geolocation is turned on, they persistently fails to action on now 2 cellphones, no battery optimization or pause app if unused so it's not this at fault,...