Hm, yeah, I am connected on 5 GHz on all my devices and it is working fine. My main VLAN runs a combination of 2.4+5 GHz.
I have some light bulbs that use Zigbee which would be the only other things running on 2.4 GHz in my home. Could it be a source of congestion, and if so, why did this not happen with the previous computer?
I checked out WiFi Analyzer. What exactly would I be looking for here?