something went wrong with update release 6.31

Hello,

I have a RB2011UiAS 2HnD and today i’ve upgraded the routerOS to 6.31
system automatically rebooted and everything seemed fine until my Wireless decided to constantly drop my laptop connection which was already in my ACL rule and had WPA2 / AES CCM enabled.

restarted the wifi adapter from the laptop re-entered the saved password towards the wifi connection, unfortunately it didn’t help a thing.
So I didn’t know for sure what was going on but I rebooted the router manually just to be sure.
Nope still nothing has changed.
So I checked the logs for more information during the connection setup.
got the following messages

@wlan1: connected
@wlan1: disconnected, unicast key exchange timeout

the time frame this happens is variable between 2~8 seconds where the ACL can see the connection but then the wlan immediately drops the connection for some reason I do not understand, as it worked before without problems…
Luckily i had settings back-up so i restored those… guess again nothing has changed i still can’t connect from wlan port.

so I resetted all the configurations and did everything all over again from scratch… in the end still the same…
wired works fine but wireless is just broken.

Any advise?

Kind Regards,
StaleDevil

I have the same problem! Have MikroTik RB951Ui-2HnD updated to the latest 6.31. Usinig WPA2-PSK AES ,no TKIP.
Ipad and android devices have same connection problem “disconnected, unicast key exchange timeout”
Ive noticed,that when i set wifi password without setting admin password, i can connect to ap.
But if i set admin password and wifi password,then i have this disconnect issue.