Execute pin from the Input node of a Collapsed Graph does not show the flow of execution

The flow of execution, shown while debugging a blueprint, does not show for the execution pin that comes from the Input node of a collapsed graph. It shows for the rest of the graph.

Regression?: No
This also occurs in 4.13/4.14

1. Open the attached project
2. Open ActorBP in the Blueprint Editor
3. Double click the collapsed graph in the Event Graph
4. Press Play
   Result: The execution from the Input to Branch node does not show the flow of execution, although the execution from the Branch to Print String node does.
   Expected: The flow of execution shows throughout the entire collapsed graph.