Ran into a feature of theirs that has caused much head scratching this past week.
I run most of my essential network services on VM's, on ESX. Since this past week the entire box has been dying and I don't know why. Currently I am unable to get a screen hooked up to it (it's buried because of many reasons). But anyway, that aside, when trying to figure out what was going wrong, I was blaming switches, and everything else except the ESX server. The trouble is, it is very difficult to troubleshoot a network when you are blind to a lot of it.
Anyway, I've had issues before but this time ran into something different that totally stumped me. If I rebooted the ESX box - works anywhere between 10 minutes and several hours. I have my own suspicions about that but that's not relevant. The thing that *really* got me was all three of my SSID's mysteriously vanishing into thin air even with all 3 x AP's up and running. Reboot them and they come back for 5 minutes, then **poof** - gone again.
Eventually realised that these things do uplink monitoring and I can't turn it off because my Unifi controller is in a docker container.......... on my ESX box.
So, now I know, I can work around it, but what a pain in the ass feature I will be turning off ASAP.