@budgie29 I migrate to Deco M5 from UniFi UAP-AC-LR a month ago I did not have this issue with that AP, so I'm pretty sure that the phone is working well.

I have 3 DECO M5 v3 with 1.5.3 FW I have 40-50 WiFi device connected. All seems to go well, except for a Xiaomi Redmi 9C phone that disconnect itself and quickly reconnect about 8-10 times in an...