We purchased a bunch of MR33 APs to cover all our offices. We have two remote offices, each with one AP. When I unplug one AP, the other AP goes down. I noticed this when I deployed them. I unplugged one of them at my main office to deliver to the remote office. When I did that, the other AP went off line. When I plugged in the AP at the remote office the other AP came back on line.
I have 25 APs and these are the only two that seem to have that behavior.