Question with 8.1.5 problem

Has anyone experienced the problem where you go into the AP under Session Status and click on a SM to go into the radio then the AP starts to drop RF packets to other SM’s? We have one site that has 91 SM’s and when we do this it will drop about 20 of them RF wise for about 1-2 seconds then they come right back in again. The other problem is, the AP will never go into the SM. I appreciate anyones response to this. Is this yet another flaw with 8.1?