Why does this mesh deform while weightpainting? When trying to weightpaint my mesh some mesh gets deformed.



I searched for an answer and found this question, but the solution does not work. The problem only affect some bones - all bones which have a IK. If I subtract the weight paint the deformation goes back to normal.

The .blend file can be found here
if you switch your armature to rest pose in the armature tab, properties editor, you can be sure that all bones are in their default orientation and location, even with constraints on them. thats easier and faster than manually trying to find them and resetting values.