Question Animator.MatchTarget issues

I've seen similar questions to this before but nothing that can answer my question.

I'm trying to use Animator.MatchTarget to have the characters hands grab a ledge during a jump animation. I've created an empty GameObject as my target for the time being and I've ran into a few issues.

I'm currently using a Character Controller to handle my movement, and in place motions for my animations.

I have some weird issues.

1. With my Character Controller enabled, MatchTarget doesn't behave as expected. It seems to only take the Z axis into account. Disabling the Character Controller gives me the result I want.

Is this expected behaviour? Are there any alternatives ways of matching my animation for varying heights?