5.8 GHz not longer working with ROS 6.43.3

Hi,

we have a couple of different Mikrotik Wireless Systems running. After upgrading some of them to ROS 6.43.3 the antennas didn’t no longer connect to the APs running von 5.8 GHz.

After upgrade wireless scan doesn’t work either. It sees no networks although there are many.

After downgrading to ROS 6.42.9 the link can be established again.

Is this a bug or do I have to change some settings with the new ROS-Version to work?