Linux standalone build UI shifted

Hello i recently built standalone linux, everything is fine and good EXCEPT that the entire visual UI is shifted upwards; the problem is that it ignores the application bar (idk made by gnome or gtk or smth), and just draws UI starting from top left corner of the entire window; you can see a black bar below.

the annoying thing is that the clickboxes are somehow in the correct position; it is only visually offseted, and i have to click everything a bit below where I see they are.

anyone have the same problem? any ideas how to fix? i am not familiar with window managers or gtk