Humanoid Prefabs fall into terrain

Hello!
I think and hope that the following GIF shows you the problem enough to help me:

This happens to lots of {or all, idk} my humanoid prefabs, but when I place a capsule into the scene,
the capsule stands correctly. I already disabled the attached scripts to check which one causes
this problem, but It did not change anything.
So, please help me to solve this annoying problem.
~Fevenius

 

I would guess that you have a problem with wrong pivoting or one of the scripts are going wrong.

 

Check the animation as well. It may move the root join down like that.

 

Thank you both for your answers:
I disabled the Animation Controller, so that no animation should be played and the character just stand correctly.
But a few days ago all went well with the same animations {and the same Animation Controller}...
Any ideas how i can fix it, without changing the animation-files, cause they are from 'Movement AnimSet Pro Lite' and
I did not find any other ones which are free and work.

EDIT:
It was the Animation Controller, which did not have any Idle animation attached to the idle-state.

~Fevenius