not so fluent Animationmix

Hey peeps,

I have an issue with two animationlayers that are prepared in Blender so they animate seamlessly together. The first layer is an idle pose of a character, the second layer has the action: it´s a step forward out of idle pose and back into idle pose. I trigger the action on tap. 

all works like a charm, let alone the switching back to animationlayer one after the actionlayer has finished playing. My character stops for a moment and its pose then snaps back into idlepose.

Can anyone give me an advice on how to set this up so it transitions smoothly forward and back?

thanks my dears
cheers eL