Kerbal Space Program

I has several times issues with a vessel in the VAB, all with the following results:
- Staging diagram disappears
- Launch button not working
- Mass, Lenghts, partscounts, etc are all zero.
- Adding new parts is impossible
- Loading a new vessel, leaves the old vessel in the VAB (clipping through each other)
- Moving existing parts is possible, but its impossible to place or park them somewhere else (they stick to your mouse). Also not al the attached parts move with it, leaving parts floating mid air not connected to the parent part (first part placed)
- All connection nodes are disappeared
- With the offset, root and rotation function active you could not select any part

I sadly could not recreate the issue in any reliable way, it happened to me quit random with several vessels. But it always happened when I move and park a part somewhere in midair for later reuse. The problem seams to be related to the vessel itself because other (saved) vessels works fine in the same session.

I tried several solutions:
- Saving and reloading the vessel > No result, vessel still broken.
Loading an other vessel > Newly placed vessel works fine, leaving the problem vessel clipping through it however.
Exiting VAB and reopen it > No result, other vessels works fine however.
Restarting KSP > No result, other vessels works fine however.
Rebuilding the exact same vessel -> Works fine, solves problem.