[Q] How to fix UniFi AP 6 Lite not using 'Wired' uplink? Not just disable meshing

Hey All,
I seem to have a weird issue in which my UniFi AP 6 Lite used to connect via the wired uplink but now doesn’t and will mesh from another access point.
It was working for a while just fine, however as I usually do a periodic check in unifi connect I saw that it was no longer using the wired uplink hence this round of trouble shooting.
I have 2 other UniFi AC Lites working just fine using wired uplinks.
I have tried to turn off meshing in the AP’s settings however it doesn’t connect via the wired link anymore and just will stay isolated if i do that.
I have tried factory resetting, no luck
I have used a simple cable tester on each of the patch cables and the in wall run which all show as no broken connections, so it’s not that.
I am using the POE injector to save my POE switch so i unplugged that and tried to go through the POE switch and still has the same, not using uiplink issue.
I have a not been in the roof or climbing around or had any work done in that area or in the roof to damage/disturb the cable (plus there are a bundle of cables running the same length if one was cactus i would assume others were as well)

The only thing I can think of at the moment is something to do with the AP 6’s ethernet port is damaged/not working correctly so it can see the power but the data aspect of the connection is not doing anything

Anyone got any tips or things I can try??.. Kinda annoying when it is the best AP out of them all and I’m getting sub-par issue with it being the newest as well.