Dragging an asset onto an asset player node doesn't dirty the animation blueprint

When the user drags an animation asset onto an asset player in the Anim Graph, they are not prompted to recompile the animation blueprint, even though it needs to be recompiled to have the blueprint update.

1. Open QAGame in editor.
2. Open QAPawn_AnimBP in Persona.
3. From the Asset Browser, drag an animation sequence into the graph.
4. Compile.
5. Drag a different animation sequence onto the asset player node.

RESULT

The node is updated but the blueprint isn't dirtied.