Worlds imported from Xbox One Console Edition should have the 'CenterMapsToOrigin' tag set to 1.

Maps created in Console Edition are imported as level 3 maps centered on the origin (0,0), matching the area the originally covered. However, with 'CenterMapsToOrigin' set to 0, any new (level 3) maps created in the imported world are offset by 512 blocks (one half map) from any existing maps. This creates a forced overlap and makes it impossible to complete any existing map walls with contiguous maps.

More to the point, this is unnecessarily confusing for casual players, especially since the overall behavior of maps in the most recent update isn't inconsistent in principle with how Console Edition does it. It could (and should) be as simple as learning that you now have to scale maps up to level 3 to match your old ones. Yet, not only is there seemingly no official explanation of this behavior (outside this tracker, i.e. MCPE-27025), but it seems the only solution to be offered anywhere is "start all over".