This connection issue seems to be fixed for me now, while I am still not what I did to resolve the connection makes any sense. The original issue was I could not use this Archer T3U to work on my...

@kevinkyng I have had the same experience with Archer T3U. I am unable to connect to the 5Ghz band (on channels 36, 44). I am on macOS Catalina Version 10.15.4 (19E287) MacBook Pro (Retina, 13-inch,...