Phone->PPTP works, Phone->Router->PPTP doesn't? Same IP/DNS!

[vpnnewbie]

Hi guys,

Strange problem: Connecting my Android straight to a PPTP server and my streaming app works as desired.

Connecting my TP-Link router to the PPTP, and my Android to the router, and my streaming app gives a location error.

Both ways I get the same IP and the same dnsleaktest.com results. I just can't work out what would possibly be different between the two methods - anyone got any idea?

Thank you!