Will try to help you with that.
Please run these commands from the local controller these APs are attached :
show ap database long | include <ap mac address>
show ap config ap-name <apname>
show ap active | include <ap mac address>
Did you recently started seeing these APs behave that way ? Were these APs broadcasting the SSIDs ?
Has anything changed recently ?
What AOS do you have installed ?
Also make sure you open a TAC case just in case.