I always set "Control Channel" on a fixed channel
(channel 2 for 2.4GHz and "Channel bandwidth" 40 MHz - channel 36 for 5GHz and "Channel bandwidth" 20/40/80 MHz)
and I never had any disconnection problem.
Connections have always been good, stable for a long time (1 month) and no drops.
After updating router firmware, I did not realize that "Control Channel" was automatically set to "Auto" ... so started disconnecting issues, especially 5GHz band, in particular for Samsung Home Audio Wireless devices.
Perhaps some devices do not fully support all channels (36, 40, 44, 48, 52, 56, 60, 64, 100, 104, 108, 112, 116, 132, 136, 140), especially those high, and there may be drops problems connection when router changes channels automatically.
When automatic channel change, connection stops and resumes.
This may be a devices wifi problem, but it may also be (and it's most likely) that it is a router wifi drivers problem with automatic management channels: the changing channels is not handle smoothly and without interruption.
Currently, as in the past, I set "Control Channel" over a fixed channel and so far I have no drops and no problems that, I repeat, I never had in the past.
View attachment 9716