UE 5.3.2 via import heightmap from GAEA & QGIS Clipped proxies

Good afternoon, I have encountered the following problem, when I import a height map, no matter raw or png or jpeg, I face the same problem - my world is cut off, namely for some unknown reason, regions are created during import (they are not clickable) and part of the proxie is invisible.

How to solve this problem?