No position updates occur if not permitted at startup on iOS, even if permissions change later

After create the position source (corelocation) with QGeoPositionSourceInfo and start the position updates, if the service location is not activated on the device then the dialog to activate it not appears and an error is emitted (QGeoPositionInfoSource::AccessError). The position is never retrieved even if I turn on the location service after.

If I start the position updates with the location service activated then I receive the position correctly.

Moreover if I turn off the location service manually after the updates start, then the dialog to reactivate it appears and the position are still received when the service is reactivated.