Adding animations to imported models

So, I’m having a rather odd problem.

I import an model. add the model to a prefab.

Later down the road I add an animation to the model, I hit apply. So it should change any instances of the object in other prefabs.

It never adds this animation to the instances of it in other prefabs. Is there something I’m missing here?

this issue only occurs to instances of the model that are inside of other prefabs.

An instance of the model by itself in the scene doesnt have this problem.

Do you mean you are adding the animation from within Unity or from the 3D app? It is a known issue that objects with animations inside prefabs update in the way you describe when you change them in the 3D software. However, if you are adding the animatiions to the prefab directly from within Unity then it may be a new problem.