[Unity 5.5] Rootmotion overriden by other layer

Hello, since Unity 5.5 i been having some problems with my animations, the most notorious one is that i have 2 layers of animation, one for general animations + movement animations and another layer for upper body animations like Aiming, Changing weapons and Reloading.
Everything seemed to work perfect until the upgrade, the root motion movement is being overriden to 0 when i activate the upper layer for aiming or changing weapons.

Can i get some help for this?