Once you change any APs from local to h-reap, you need to define the WLAN to vlan mapping. This is done by clicking on the ap and clicking again on the h-reap/FlexConnect tab. There you will set the nativ vlan and hit apply and go back to that page and click on vlan mapping. You need to set your WLAN to local switching also. All this is documented in the h-reap or FlexConnect deployment guide.