Zooming in a map always picks the same center for the next map

If a map is zoomed in, the center of the zoomed in map lies always in in the south east corner of the previous map.
Since the center of the 1:4 map can´t be chosen freely on creation, it is only possible to create 1:1 maps for 1 out of 16 chunks.

How to recreate.
1) Get an empty map
2) Activate map with right click
3) Zoom in using shears