Actor references in Level Blueprint show an incorrect display name after converting the project from 4.6.1 to 4.7 Preview or 4.8

Actor references in Level Blueprint show an incorrect display name on their nodes after converting the project from 4.6.1 to 4.7 Preview or 4.8.

Reproduced in 4.7.1 Preview 4 and in Main (Promotable-CL-2418131).

1. Open any project in 4.6.1 binary
2. Place two Box Triggers in the level
3. In the Level Blueprint, create an OnActorBeginOverlap node for each Box Trigger (note the name of the reference on the nodes, TriggerBox and TriggerBox2, respectively)
4. Compile/Save
5. Convert and open the project in 4.7 or 4.8
6. Open the Level Blueprint

Results:
The OnActorBeginOverlap nodes display a different name for the Trigger Boxes in the level (TriggerBox1 and TriggerBox4). The Trigger Boxes retain their original names in the SceneOutliner and the nodes still function, but the name on the nodes is incorrect.