Strange scaling behavior

Hello, I am having issues scaling my rigged characters.

As you can see from the video the IK effectors maintain correct positions after scaling, but the constraints do not apply correctly. This is still the case when scaling before I hit Play.

The character is playing both FK (when rig weight is 0) and IK (when rig weight is 1, which overrides FK) animation.


Hip has a multi-parent constraint, SpineAlignment has a multi-rotation constraint.
Parent objects have no components


There is an issue with the Multi-Parent constraint not handling scale values properly (link). It's been fixed internally, but the new version of the package has not yet been published.

Also discussed here with a possible workaround: