The correct position for the current location should be adjusted slightly lower, to account for the data fields that are now covering part of the map screen. But the map position does not change at all when you enable data fields. This reduces the amount of area shown above the current GPS position.
Basically the map position is not adjusted to account for the data fields. This is not an issue in track up mode, because the gps position is in the lower part of the map, so with extra data fields on the top it still looks correct.
North up with and without data fields: