One of the things I love about the 920XT are the INDOOR Activity Profiles. If you choose the right one(s) then they will automatically turn off GPS and hence automatically look for pace from another appropriate source (pod).
If you ever have the need to MANUALLY turn GPS OFF or ON then you do this:
Select : >Activity Settings> GPS > On/Off
That’s equally as annoying as it was with the 910XT. However, as I say, profiles are the way to go to avoid the annoyance.