hap ax2 v7.9 wifi not working

I had the same behaviour after upgrade from ROS 7.8 to 7.9 (as you can see in my topic http://forum.mikrotik.com/t/wireless-clients-not-connecting-after-upgrade-to-7-9-hap-ax2/166453/1 However, after I managed my configuration to work with ROS 7.9, I experienced issues with signal stability and strength even when all devices remained in same distance from router as for ROS 7.8. I guess that ROS 7.9 have some combination of SW+HW issues with hAP ax2. Now, I am running 7.10beta8 on my ax2 and it seems that this version is the most stable since my first hAP ax2 setup (from 7.6 to 7.9, the 7.10beta8 is the most stable version with good performance). Please, try upgrading to 7.10beta8.