Only one radio working on Linksys WRT3200ACM


I have a Linksys WRT3200ACM with 3 radios, I have 2 active each with their own SSID. One of the radios stopped working, devices can see the SSID but fail to connect to it. If I disable the radio that is working, the other one works.

This already happened about a year ago and I followed some instructions to remove a line from the configuration (I think something about MAC addresses?) that fixed the issue but I don't remember what it was and I can't find the information anymore.

I'd really appreciate any help.

After 3 reboots, it started working.