SauRoNZA
Honorary Master
Surprised to read about people having issues with UniFi handover. I have two LR APs on either end of the house and an Outdoor+ to cover the outbuildings and garden. Handover has never been an issue, although maybe the distance between the APs helps. The outkirts of their coverage only just touch one another, and the outdoor AP's WiFi flies clean over the main house and isn't detectable from most locations within.
Do you have the controller running 24/7?
I've had a suspicion that handover is only handled correctly if the controller is running to monitor clients and shift them.
When it isn't running the AP's operate by themselves in a stand alone fashion.
But never got around to testing it.