WLAN Controller Stops DHCP working but....

We serve 2 VLANs from the controller and it seems to shut down DHCP traffic for one of the 2 VLANs. Has anyone seen this or any ideas why? We have to reboot the device to get DHCP working again.
NOTE: Its only setup to pass DCHP requests through to our DHCP server.

try Disabling DHCP proxy and try once... Controller >> Advanced >> DHCP >> Proxy >> Disable (Uncheck) >> Apply >> Try connecting.
Regards
Surendra

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