I have been encountering a problem since this morning.
I may be awake badly, but it seems to me that I didn't draw like this before.
Let me explain: I'm drawing a simple bent sheet metal. When I want to modify the sketch of a fold to dimension or redraw it, I have a problem with the relationships.
When you look at the attached image, you can see that the lines that are supposed to be horizontal or vertical are no longer horizontal... (Here, I'm in right-hand view).
It seems to me that the relationships are not in relation to the existing sketch but in relation to the plan, right?
Personally, I've always had this because your first fold is not 90° to your base and your sketch plan is perpendicular to your reference face for your acutel folds.
What I do if I want to have my line parallel to my plan on it here in orange, I put a parallelism or a collinearity relationship with the stop I need. it saves you a construction line.