hAP ac^2 Problems---Extremely Poor Performance found in 2.4G and 5G WiFi

You should read the forum more carefully.

http://forum.mikrotik.com/t/v6-43rc-release-candidate-is-released/118681/18

http://forum.mikrotik.com/t/v6-42-current/118561/119

See what strods replied to me.