if you use antenna ports 1,2,3,4 for 5GHz, you cannot use ports 5,6,7,8 for 5GHz also. It will create RF interference being that close on independent radio chips.

I ended up using a program to draw the pattern in from the spec sheet.https://www.wireless-planning.com/antenna-pattern-editor

Have you tried setting Gi 0/23 to a trunk port instead?