"Lost" my 5GHz WiFi after 6.41 upgrade

RouterOS Wireless Networking
1

Hi all,
(If this is a Known Issue, I apologize for opening another thread. Please make a reference to the right post)

After upgrade my hAP ac (RouterBOARD 962UiGS-5HacT2HnT) to version 6.41 I’ve “lost” my 5 GHz WiFi network interface (wlan2). On Interface tab it appears only as Slave but not running even it is enabled (see below).

Opening Wireless interface configuration tab - running state is grayed out (see below)

In Bridge tab, wlan2 interface appears as disabled port and also Inactive

Do you have any ideas how to bring it back to running state? I already tried to downgrade to 6.40.5 (when it worked) along with reset configuration and restoring an older backup. The last point will be to reset to factory defaults and manually configure from the beginning.
Also, I upgraded routerboard firmware to latest 6.41 (still no changes)

Thanks in advance.

2

Wireless interface states are marked as running only when a client is connected to them.

The “running ap” mark indicates that the AP is u and broadcasting the SSID. Are you able to see this SSID on your devices?

3

This interface get the flag running if one client is connected to it!

4

I think I found the problem. The only 5GHz device I have is my phone, and I realized that it cannot see any 5 GHz network! If i do a network scan with my MT I can see my neighbor 5 GHz Wireless network. :confused: I will reset my phone and will check after that.

UPDATE:
Channel selection was set to auto, so it was broadcasting at unknown frequency for my phone. I set manually a channel and my network appeared on the phone.