Orbi RBR50 - disconnected devices continue to show as connected

I have an issue with devices that are disconnected (WiFi off or powered down), but continue to show as connected in the Orbi app and via Web browser (192.168.1.1).

I had an issue where the connection for my primary PC (Macbook pro) got hosed, and caused my WiFi to stop working. I attempted to reset (power off/on) everything several times (which usually resolves any issue), but kept getting the magenta light on my router. The issue started as I was accessing the Web with my Mac.

I have access control enabled and was hoping to remove my Mac from the (allowed but not currently connected) access control list, but it contined to show as connected even after I powered my Mac down and performed several router/satellite reboots.

I resolved my issue by reseting my router and reconfiguring my WiFi. I'm running the latest firmware (V2.5.2.4)