Need some help with Animator Layers

Hi there !

I'm working on a the animation of a character using a bow. My goal is to have the character be able to orient its torso according to a target position, while I want to legs to play whichever animation is required at the moment (running, sliding, idle...). To do so, I'm using Avatar Masks. I also have made several animations that are supposed to be played by the upper body and I've set these up in a Blend State.

Here's the result:

When the animation is idle, everything works perfectly (or at least, the way I intend it to work). See here

To go further, I've created another animation, a sliding animation for when the character aims while moving. But, when I play this state in Unity, the bow's bone won't follow the movement. And I can't figure out why. Every other bone behaves as expected, but this one. I've checked the masks, made other ones, changed the rig to include all the bones (not only deform bones) but so far, nothing. Could someone please help ? This is really annoying.

Thanks a lot !