Having an issue with shapekeys/blendshapes when I import to unity.

In blender I made a new shapekey for a "sticking your tongue out" gesture, all it does is stick the model's tongue out. When I slide it from 0 to 1 it properly shows the tongue in the mouth hidden at "0" and at "1" it's sticking out.

However when I export it over to unity the model now by default has the tongue already sticking out. When I check the shapekeys the new "tongue out" shapekey that I made in blender is showing set to 0. So for whatever reason "0" already has the tongue sticking out even though 0 is the tongue hidden in blender?

I'm confused what could be causing this. Halp