After our upgrade to new firmware, we have noticed plenty of problems with connection stability.
Load balancing does not work (clients are disassociated from holding AP but all other units are rejecting the client) which cause laptops adapters to freq-out and disconnect until they are manually turn off/on (wifi adapters).
Also, clients have plenty of problem holding to SSID for a long time: random drops, without option to connect with SSID, client holds the IP even tho it is already disconnected, only previously connected SSID is visible).
So far turning off load balancing improved the situation but this is no fix, although it might be a case where there is fewer people in the office so I don't get that many tickets compare to recent days.
In the meantime wired network works perfectly (wire & wifi are on the same subnet).
Anyone experiencing similar issues? Support is helpless right now...