I’ll try to explain this as best as i can and include a link to the maya file so anyone can see the issue.
(its a simple file with 2 guides and 2 rigs that demonstrate the issue described below)
When building a rig that has the “Squash” component as a parent to a “FK_Spine” component that has any “Leg” component attached. Things behave in a predictable manner.
If you build the same set up but swap out the “FK_Spine” for any of the IK spines even the new Epic ones. when moving the squash controller up and down it scales the leg off the ground when they are in FK mode… even if the squash component is at the root of the character. Is there any way to fix this?
Also regardless of the type of Spine component you have, if you attach a “Neck” component to the “Spine” when moving the Squash controller up and down it quashes and scales the Neck in the opposite axis from the the rest of the rig.
I am on Maya 2020. and using mGear 4.0.3