Stdapi commands not showing in meterpreter session

Stdapi commands not showing in meterpreter session

I created a android payload with public IP (android/meterpreter/reverse_https). The stdapi commands(ls,cd,webcam_snap etc) are showing when the victim is in the same network.

But when I try to connect over the Internet( i.e. victim is in a different network) using a public IP, the stdapi commands do not show in the meterpreter session.

Further, the meterpreter session is quite unstable, and displays errors after sometime:

meterpreter session is not valid and will be closed