In Pose Pin Does Not Immediately Appear for Sub Anim Instance Node

The Sub Anim Instance pin does not appear automatically when the Anim Blueprints are connected in the order listed above. If done in another order the "In Pose" pin appears.

1. Create a new ThirdPersonProject
2. Create two new Animation Blueprints based off the UE4_Mannequin_Skeleton (AnimBp1 and AnimBp2)
3. In the first Blueprint create a Sub Anim Instance node, making AnimBp2 the Instance Class
4. Connect this to the Final Animation Pose
5. Compile
6. In AnimBp2 create a Sub-Graph Input node and connect it to the Final Animation Pose
7. Compile
8. See AnimBp1 < Sub Anim Instance node < there is no "in pose" pin

Expected: The "in pose" on the Sub Anim Instance node appears automatically
Results: The "in pose" on the Sub Anim Instance node does not automatically appear