Packet loss wireless users 802.1x

[JlassiAhmed0345]

I have two WLC 5520 on HA SOO  with flex connect APs 702i, and I have configured SSID corporate flexconnect local switching with 802.1x authentication using ISE server 2.3 as AAA server. so when we tested the network, we have faced a problem of loss packets incorporate SSID, for example when the endpoint  (phone or desktop ) launch ping -t 8.8.8.8, we remarked some loss of packets.

I isolated the problem by testing to ping -t 8.8.8.8 from a wired connection, and found that there is no packet loss which is mean that the problem is in the wireless connection.

any idea about this problem plz ? and how can I resolve it 

[JlassiAhmed0345]

i tired ping from the switch using the SVI of WLAN users and no packet loss happened, otherwise when i used the wireless i remarked a packet loss .