Manually changed channel width and channel number can’t stay at manually changed values, channel width always changed to 80Ghz and channel always changing to 36, even if i change channel to non DFS, on router admin wifi settings all my manually changed values stays the same, but wifi analyzer says that width and channel has changed. Once this has happened it will remain like this until I either switch Wi-Fi off and on again or reboot the router. Only by doing this am I able to restore my 160 MHz wide channel placed at manually selected channel. 

My best guess is that the router might be detecting radar interference and thus changes channels (which is what DFS is about), but the rules allow the channels to be reused once the radar interference is gone, which, however, never happens with my AX50. It seems it will just stay at channel # 36(80 MHz width) forever. 

I already saw threads of people with the same problem, and they were given beta firmware with fix for this problem. @Kevin_Z maybe you can help?