Well, my ATA is connected just fine to my Wifi at home and the ATA works beautifully.
My cell phone (Moto Z4 Android Pie) on the other hand is not ringing. When I go to Settings > Network & Internet > Wifi it shows the phone is connected to my Wifi. But if I try to dial out on the cell phone it says no cell phone service. This happens often but not always.
I do have Doze Detect 0.9.6 installed so the phone sleeping is not the issue.