Give it a try! Openspot uses Google cloud servers. It's been my DNS setup since I've been using Openspot.

DNS1 server should be 8.8.8.8 and DNS2 server should be 8.8.4.4! Please turn on "override DHCP DNS servers" function on network page IP settings submenu.

I suggest you download this free useful software too.

Okay, I see you've edited your post and attached a screenshot of your router settings. How much the Openspot RSSI values?

Did you turn off automatic channel scan too? This feature is enabled on the screenshot what you posted here.

Please turn OFF "enable auto channel scan function", set to 20 MHz channel width and channel 1 in your router menu.

I've just tested to switch profiles on OS2 and my Samsung Galaxy S8+. I could change profiles with out any problem both of web interface and using DTMF codes. My question is for you ED, are you using a lowercase letters for WIFI password?

https://forum.mikrotik.com/viewtopic.php?p=541785

Please turn OFF standby beep sound function in your radio menu!

The new Australian IPSC2 server is in the list now.

Openspot database have been updated.