The shape keys changes are only visible in edit mode. It only shows the basis in object mode no matter what. Enabling the shape key edit mode also makes all my changes invisible.
When I export the model, it only exports the basis and disregards all shape key values.
Shape keys of other meshes are behaving normally. I disabled the addons I used, I tried to separate the meshes, I also tried to reset the vector data for the normals I edited (the last thing I did before this happened). Non of them worked.