[Saris]

Android tends to hang on to APs even if they're at a completely unusable signal level with no connection. Doesn't matter if fast roaming is enabled, doesn't matter if bss transition is enabled.

The only solution I've found is enabling the minimum RSSI feature on my APs, this forcefully disconnects any clients with a low signal.

Devices usually take 5-10 seconds to reconnect to the new AP after this happens, but will also sometimes will fail outright for a minute or more while Android insists on trying to connect to the old AP with a worse signal and keeps getting kicked off, before it finally gives up and connects to the stronger signal.

Raising the minimum data rate can also help, as long as none of your devices are really old and need them.