Mesh satellites only allowing 2.4GHz connections?

[HH22]

RT-AX86U system with three XD4 mesh satellites behind it (all hardwired backhaul). Two of the XD4s have devices connecting to its 5GHz signal but one of the XD4s only shows connections at 2.4GHz (there are several devices that are absolutely capable of connecting at 5GHz, and do when connected to the other XD4s). All of the settings across the mesh units are identical. Any thoughts around what might be going on? Devices are within ten feet of the suspect XD4 so distance doesn't appear to be a contributor. Thanks.

 

[glens]

A simple check would be to swap a couple of the nodes and see if the problem follows the node.