“Online Devices” and “Offline Devices” seem to be stuck?

Friday I switched ISPs. The new ISP gave me a 7 Pro Max to be the gateway. So I used the Erro app to swap out the current 7 Pro gateway for the new 7 Pro Max. Now it seems the “Online Devices” is stuck at 55 and the “Offline Devices” is stuck at 50. For example we watched an entire episode of Project Runway and the Apple TV we were using appeared in the “offline” list while we were using it. Anyone ever seen this?