We probably do not understand. My English is bad.
1. TC arbitrarily changed 3 named Worksplanes (their z-location). Arbitrarily. See Attachment. Why? I do not know. That's what I'm trying to find out.
2. Once I found that named worklpanes is changed, I repaired it and continued to work. I have not noticed problems, so why not work further, right?
3. About two days later, I began to work in another area of drawing and discovered the first problems. So I started to solve them. But it did not work. So the problem was detected.
4. If only any named Workplanes were changed without further consequences, I would still work. But it had the consequences.
5. What I send is a demonstration of what happened in the arbitrary change of named Workplanes. I do not draw it that way.
6. I started looking for the source and cause of this problem.
7. Personally, I thought that 2d objects are fixed to the work plane as a whole. So - certainly should be. Until yesterday I thought to create a 2D element, part of which is outside the plane is not possible. But as I discovered - it is possible.
8. I managed to find out how it can damage the placement of the drawing intentionally.
9. Damage is localized in one part of the drawing. Therefore, I believe that this arbitrary change of the named Workplanes occurred at the moment when I had selected a group of objects. And if I found that deliberate damage could be done when editing nodes, then I think that this change was happening right now.
Ask me why I'm doing something like this. This question is not really right.
I'm asking: Why did the TC do it?
Now I try to find unusual ways to why and how it happened.
If you can change the working plane of a part of the element that must be fixed to the workplane, then it is a bug in the program. And really big bug.
As I've already written. Simple objects can be repaired.
But what about architectural objects? A wall is an element that works as a 2d object. If any invisible internal reference for making links between the walls or a part of it is changed, so that it is placed on a different workplane, then it is wrong. They are joined by walls located on other floors. And you do not know which. Because when selecting … join is not highlighted.