GPS error after CarPlay upgrade (2018 Mazda3)

[psychotoad]

I recently updated the firmware to the latest version in my 2018 Mazda 3 (which went well, no problems) and then fitted the Carplay/Android Auto USB hub that is readily available on eBay, AliExpress etc. The hub works and I can use wired Android Auto no problem. But I went back into my Mazda navigation and it said I was about 30 miles from my actual location. I thought I'd reset things so turned the car off, factory reset the infotainment and then the GPS moved me to the road outside a Moscow Opera House approx 1800 miles away. I disconnected the battery, disconnected and reconnected the cables at the back of the infotainment unit and I'm still in Moscow City centre. Has anyone encountered this when doing the Carplay hub install?