Reroute nodes break Cached Poses in AnimBPs

Reroute nodes break Cached Poses in Animation Blueprints

Regression: This does not occur in 4.12

1. Create an AnimBP in a Third Person Template project
2. In the Anim Graph, add a Play Idle animation node
3. Create a new Cached Pose and plug the Idle into it
4. Make a Use Cached Pose node and feed it into the Final Anim Pose
5. Compile and note that the Idle anim is playing
6. Add a reroute node between "Use Cached Pose" and Final Anim Pose
7. Compile

Result: Animation isn't playing. Stuck on the first frame
Expected: Animation plays like in step 5