Create interface via IFM (REST API) generates table=0 entry ONLY IF interface name follows expected format

Creating an interface via IFM (REST API) by:
POST http://localhost:8181/restconf/config/ietf-interfaces:interfaces/

It properly creates the OF port via OVSDB in bridge if it does not exist, BUT it creates the new table=0 entry ONLY IF interface name follows a format like: "tun666b999c7a4"

{ "interface": [

{ "name": "tun666b999c7a4", "type": "iana-if-type:tunnel", "odl-interface:tunnel-interface-type": "odl-interface:tunnel-type-gre", "odl-interface:datapath-node-identifier": "75356950704695", "odl-interface:tunnel-source": "172.0.22.15", "odl-interface:tunnel-destination": "192.168.3.145", "enabled": true }

]
}

It does not create the table=0 entry if:

{ "interface": [

{ "name": "gretesting", "type": "iana-if-type:tunnel", "odl-interface:tunnel-interface-type": "odl-interface:tunnel-type-gre", "odl-interface:datapath-node-identifier": "75356950704695", "odl-interface:tunnel-source": "172.0.22.15", "odl-interface:tunnel-destination": "192.168.3.145", "enabled": true }

]
}