unable to ping VM servers at 10.17.0.100,.101,.102 from gig interface on 1921LTE, but able to ping those IPs via my cellular and tunnel interfaces

unable to ping VM servers at 10.17.0.100,.102, .103 from gig interface on 1921, but am able to via Cellular and tunnel interfaces

I need to be able to ping (confirm communication) from 172.31.16.1(my gig interface) to 10.17.0.100,.101,.102.

When I ping either of those addresses with the "ping 10.17.0.100 source cellular 0/0/0" i get a response, but if i do the same with "ping 10.17.0.100 source GigabitEthernet0/0" <-- the interface i need to be able for it respond, i get nothing.

when i traceroute to the 10.17.0.0 network without a source the traffic goes through a tunnel interface (this tunnel goes back to the controller of these LTE devices) and then back to the my core.

Any help would be appreciated