Hi Gihan,
if this is WiNG Enterprise, run Controller Managed domain
![e56f685f69234291a146a1b654a7e860_RackMultipart20170926-10273-sb2a8z-controllermanaged_inline.png e56f685f69234291a146a1b654a7e860_RackMultipart20170926-10273-sb2a8z-controllermanaged_inline.png](/t5/image/serverpage/image-id/594i9658B2084DDC66F9/image-size/large?v=v2&px=999)
This will make VX RF-domain manager and shall force APs to forward stats etc. back to VX.
As you use different GWs with every AP, it breaks the broadcast domain and APs are unable to share Layer2 updates.
Regards,
Ondrej