Sony Button Numbers - launches YouView

Hi - long time admirer from afar and finally I've but the bullet and come over. The app and the DVR feel so much more polished than anything out there and crucially it all just seems to work. Very impressed so far!

I have a Sony TV (XF9005) and bizarrely whenever I press the number keys it starts to use them in the app, but then just opens up the YouView app and plays from there. Is there anything I can switch off to stop the TV from doing this?