Well, it feels and looks exactly like the bug we were discussing here; though it very well might have a different cause. Personally, I do have a lot of soft-wrapped lines.
If the cursor jumped from the whole soft-wrapped first line to the heading node, it would be still annoying but at least consistent; but it is not. In the gif above, the first newline character is just behind
I'm interested what @Erica has to say about this.
If this is a feature, someone has to explain to me how I can use this productively.