@umeriq 

Hey

Would you be able to give us some more info on your setup?   For example are you running VLANs?   Is Bandsteering enabled and what security do you have on your SSID?

Any firmware versions would also help.  Have you fast roaming enabled?

Hopefully we will be able to help you

  @Philbert 

Yes we have 4 VLAN's enabled 

bandsteering is not enabled 

SSID Security is WPA personal with captive portal to specific common vlan other than guest 

Fast Roaming is not enabled 

Omada OC200 FW is 1.15.2 with hardware version = 1, controller version = 5.1.7

AP EAP 225 FW is 5.0.7 with hardware version US V3

will appriciate your responce 

Thanks 

  @umeriq It's suggested to disable Advanced features and test again.

If it won't solve the issue, you may need to check if the problem happens on all of your EAPs, or just one of them. On the Clients list you can monitor the client is connected to which EAP.

Try set up a 5Ghz only SSID and let that Apple devices use the test SSID.

BTW is there any Alert Log can be found? Or any evidence on the Log you can see?

  @Somnus  Thanks for quick reply

yes it seems a specific AP doing such incidents 

advance features are already disabled as well as Mesh

there are no such logs instead some authentication errors 

  @umeriq If so, you may try move this EAP to another working EAP location, to test if it is a hardware issue on this EAP. It also could be a problem on Ethernet connection between router and the EAP.