I have set up a WLAN network with VOIP using a number of Mikrotik access points (WAP ac) that are controlled by a centralized CAPsMAN (Mikrotik Cloud Core Router). The problem is that whenever I use channel 6 in the 2,4GHz Wlan interface the quality of the VOIP drops significantly. Calls get dropped, bandwidth is lowered, call quality goes down...etc. Any other channel seem to work as intended, only in channel 6 do I encounter this issue. I am using firmware version 6.37.1 if that's relevant.
Is this a known issue? I am looking for ideas as to how I can fix this problem.