Hi! I am also running Ubiquiti wireless access points (UniFi AP-AC-Mesh 3.9.42.9152) and have the same problem. Opensprinkler (3.0 DC Firmware 2.1.8 (1)) lost Wifi connection so i have to reconnect or start over the controller. Now i connected the controller to a UniFi AP-AC-Pro (3.9.42.9152) and till now it works fine…i hope.