RT-AC86U 2.4Ghz Can't Connect

I just setup a new RT-AC86U, initial setup everything was working including the 2.4Ghz band. I left for a few hours come home and update the firmware to the newest ASUS firmware (kicking myself for this) and now the 2.4Ghz band is not connecting. I can see the band, everything looks correct in the set up.

I have done all the recommendations i found on the forum such as disabling Beamforming, setting to 20hz, channel 6...

I can see the 2.4 SSID as well as the 5Ghz (which is working...

RT-AC86U 2.4Ghz Can't Connect