We have seen similar issues with AP370, HiveOS 6.5r5, HiveManager 6.8r4.
Our problem is that accesspoint is getting “lock” . Some computers can’t connect others is working fine. If Student move to another part of the school, everything is working fine. My conclusion is, that it is the accesspoint which have a problem. To correct this I reboot the accespoint and everything is working fine again.
Those student which are connected is on both radio's.
Our conclusion: it has nothing to do with antenna problem
any Ideas ?