In CommonBoundActionButton, where does the text for text_ActionName come from?

I am using CommonBoundAction button in Blueprint. I setup the text_ActionName it requires (along with the optional inputActionWidget). When I set the Text value for this “CommonText” object, it displays properly in the editor but is blank at runtime, making me think the code is pulling it from somewhere else. I thought maybe it was using DisplayName from the mapped InputAction table, but alas it is not.

Anyone know where this text comes from?