No remote AT command response with 802.15 function set

I have 2 XBee 3.0 modules running 802.15.4 flash. one is Coordinator and one is end device. Tx request works both ways, message goes through and confirmed and correct. Want to send a command and get response back. Trying remote AT command (NI) as an example using frame generator tool.

No responses. On the receive device end i see packet received but the data field shows"¢B=QÿþNI"

both in API with escapes.

I would suggest looking at Digi XBee® 3 802.15.4 RF Module