Map display in editor

[Weta43]

Maybe a bug, maybe a misunderstanding on my part.

I bought the 'whole' map.

If I look at the map of modelled regions on the FAQ, the map extends a little bit up over the northern border of Iraq:

If I go to the mission editor I can't get the top part of the map to display all the way to the border.

I play with the resolution at 2160 x 3840 - anyone else using that and able to get right to the top of the map (anyone playing 3840 x 2160 and able to get to the top of the map?)