Apply Additive and empty Pose results in distortion

In my AnimBP I want to apply additive anims based on the current motion. My setup looks like the screen below… I use a BlendPose on Enum and feed the result in an Apply Additive node. Since I don’t use additive animations on all my motions, some poses are empty. However this results in weird distortion (the mess in the preview error once was my character…)

Not using the BlendPose on Enum node but pluggin my additive anim directly to the ApplyAdditive node works fine.

Am I using a wrong approach? How would you deal with this scenario? Feeding in additive animations via an AnimMontage works fine, but in my case a state machine would be the better fit.