AppleTV won't play live or recordings

I hooked up Tablo Dual Lite via Ethernet and everything worked fine on both AppleTV and Amazon Fire. However, I needed to move the antenna out of my computer room to get better reception of a tricky channel. I connected Tablo through wireless. Everything’s fine on Amazon Fire. But on Apple, I get the circle as if it’s buffering. Eventually, I’’’ click on play and it will play a second or two before freezing. This works on both LiveTV and Recordings. I’ve started a ticket with Tech Support and have run the diagnostic app they suggested. I’m just trying to see if anyone has experienced this and how they addressed it.