After upgrade to 7.20.4, SSID no longer broadcasts for 5 GHz channel

[AstroPig7]

After upgrading my hAP ax³ from 7.19.4 to 7.20.4, I can no longer see the SSID for my 5 GHz channel from any device. The 2.4 GHz channel is broadcasting and operating normally, and I see no errors in the log for the wireless topic. I’ve tried manually setting channel.frequency, among other settings, but nothing seems to bring it back to life. Below is my /interface/wifi configuration:

/interface wifi channel
add band=5ghz-ax name=5GHZ
add band=2ghz-n name=2GHZ
/interface wifi security
add authentication-types=wpa3-psk name=5GHZ wps=disable
add authentication-types=wpa2-psk multi-passphrase-group=feesh name=2GHZ wps=disable
/interface wifi configuration
add country="United States" disabled=no manager=local name=2GHZ security=2GHZ ssid=FEESH
add country="United States" disabled=no manager=local name=5GHZ security=5GHZ ssid=CHEEPS
/interface wifi
set [ find default-name=wifi1 ] arp-timeout=auto channel=5GHZ configuration=5GHZ disabled=no l2mtu=1560 mac-address=48:A9:8A:97:21:20 name=wifi1 radio-mac=48:A9:8A:97:21:20 security=5GHZ
set [ find default-name=wifi2 ] arp-timeout=auto channel=2GHZ configuration=2GHZ disabled=no l2mtu=1560 mac-address=48:A9:8A:97:21:21 name=wifi2 radio-mac=48:A9:8A:97:21:21 security=2GHZ

No other changes were made to my configuration prior to the upgrade. Is this a known problem I haven’t been able to find documentation of?

[AstroPig7]

I should also add that trying to manually join the 5 GHz network (like a hidden network) did not succeed. I have tried disabling and re-enabling the interface.

/interface/wifi> print
Flags: M - MASTER; B - BOUND; R - RUNNING
# NAME CONFIGURATION.SSID
0 MB wifi1 CHEEPS
1 MBR wifi2 FEESH

[jaclaz]

Try adding deprioritize-unii-3-4=yes, see:

Ax3 upgrades from 7.19.3 to 7.20.2 broke 5ghz wifi!

Ugh! I had to stick my fingers in it. I upgrade an ax3 from 7.19.3 to 7.20.2. All was working great at 7.19.3. Now, I can’t connect to any of the 5ghz SSIDs. I tried changing from AX to AC, I tried changing “Skip DFS Channels,” I tried connecting from multiple devices. Then I tried running a wifi scan from another ax3 and it saw my 5ghz SSIDs – Sure seems like that means the primary ax3 was sending out announcements of its existance. So I downgraded back to 7.19.3 and still my devices won…

If you don't skip dfs channels, it will take some time to have the 5GHz up.

[KiwiGuy]

@jaclaz Wasn’t there an issue where the 5GHz (or was it 2.4GHz) would drop out whenever something was connected to the USB socket on the router? Unplugging it made it work again? Has that been resolved, do you know?

[holvoetn]

Not jaclaz but that would be 2.4Ghz.
USB 3.0 signals generate more or less the same frequencies.
Only solution for that problem is to make sure your USB connector is properly shielded.

[KiwiGuy]

@holvoetn

Not jaclaz but that would be 2.4Ghz.

Thanks @holvoetn , much appreciated.