Apple TV - Cannot Find Server Through Wired Connection

Server Version#: 4.156.0
Player Version#: 8.45

I have an issue with my AppleTV Plex app not finding the Plex server on my home network when directly wired in to a network hub.

Connects no problem over WiFi and the LG Plex app on the TV also connects with no issue over a wired connection to the same hub.

AppleTV and server are on the same subnet too.

Any ideas as to what’s going on and how to solve it?

Thank you

Setup:

Not Working: AppleTV→Hub (Unifi USW Lite 8 PoE)→ Mesh Router (Unifi Express 7) →Wifi→Mesh Router (Unifi Express 7) → Plex Server (MacOS - wired into router)

Working:

LG TV →Hub (Unifi USW Lite 8 PoE)→ Mesh Router (Unifi Express 7) →Wifi→Mesh Router (Unifi Express 7) → Plex Server (MacOS - wired into router)

AppleTV→Wifi→Mesh Router (Unifi Express 7) → Plex Server (MacOS - wired into router)