Root rotation not working in blend tree

I am using a blend tree to control the animations of my players legs. I completed the model and blend tree, then realised I needed to reanimate it to add prone and crouch. I did this, set up my animations for different rotations with the root rotation settings, and started the blend tree. Even though the animations rotation played normally in the preview in the project tab, in the blend tree the root rotation offsets are having no effect. I’m not sure why, and any help would be appreciated.