So, I ran into a similar issue and I will say to not mix wired and wireless vlans if you need to communicate between the devices.
The issue is a setting under the advanced of the SSID called P2P Blocking Action. The default is disabled which seems like it should be fine, but the devil is in the details from the descrition:
Disabled—Disables peer-to-peer blocking and bridges traffic locally within the controller whenever possible. This is the default value.
The issue we had is it seemed to block arps leaving the controller so the device could not fin the host. It would start working after ~15 min probably when the host arp'd for something and the client learned the host. The only fix we had was to change the vlan and that was fine so long as it had to cross an IP boundary.
