Why does spawn affect PhysX behaviour, when PhysX is deactivated?

[Alexx31]

The situation is that many animated objects were spawned by a surface test.
As the object is spawned only once at the first frame, it can't has to do with the jitter in the later frames.

I have those tasks which I can't solve right now:

1.)
- Objects should collide (PhysX), and go into a new event, but keep their animation. 
The only way to keep animation I found until now is to spawn and link children to their parent.

2.)
- They should be spawned (once) with a surface test. I have still no idea how that is possible, while keeping their parents in place.

3.)
- As soon as the child have been spawned, the parent should become invisible (by material) and deactivated by physX.
I only need them to read out their animation. So I can't delete the parent and it must stay in that event (afar as I have tested it).

I also tried to solve it with custom properties, but did not succeed.


2) and 3) are the more important things, for the first I can find a workaround.

Thanks
   

---

I have asked now also on Facebook, maybe Simone can answer Example file: https://we.tl/t-Ai7xlft7sZ