Just upgraded to the latest firmware about a week ago.  Now, random wifi clients (laptops, Amazon Echo, android phones, Sony TV, Xbox) will randomly disconnect from the wifi network and are not able to reconnect.  Sometimes restarting the device will allow it to reconnect, but not all the time.  Is there any way to rollback the firmware update or anything else I can change?  I have the 3 units, 1 satellite is connected via ethernet backhaul and the other is wifi connected.