I'm losing my mind with this issue. I made some edits to my avatar in blender (the mesh) and something has gone wrong with the shapekeys.

When I import the avatar to unity the avatar's tongue sticks out. I have a "tongue out" shapekey to stick the tongue out and for whatever reason it's now constantly enabled...despite the "tongue out" blendshape being at 0. Sliding it to 100 does nothing...yet in blender the tongue is not out and it's at 0 when I export it. In blender if I slide the shapekey from 0 to 100 it correctly moves the tongue from off to on, but in unity it just completely gets fucked. I have no idea how to fix this or why it's not working