When I instance my HUD inside a scene, one of the labels is displayed in the wrong place - on the left side, off the screen. Despite the fact that it's anchored to the "Center Right" inside it's container. "Top Right" doesn't work either.
This is my UI (Control) scene, everything is fine here in the editor:

But when I try to instance it inside my TestScene the ScoreLabel is in the wrong place:

TimerLabel is anchored "Center Left" inside TopDock (and works fine), while ScoreLabel is anchored "Center Right" and jumps to the very specific, but wrong play.
I also tried to do it without a TopDock element, but that didn't now work either, with exactly the same result.
What am I doing wrong here? Why that is happening?