I spent a few hours trying to reproduce this in a new project but had no luck. I even tried migrating over the Blueprints and C++ classes involved but it didn’t make a difference; meanwhile, I’ve re-created all of the Blueprints in my actual project but it still occurs.
I started with version 4.14 for this project so nothing was created in an earlier version but possibly something went wrong between 4.14 and 4.14.3 and had an effect.
I’ll try creating a new project and migrating everything in my current project over to see if that solves the issue.