I have a similar problem. In my case, a single blueprint instance in the scene works as intended. The rest won’t make my character animate on interaction. I think I have used at some point an event dispatcher…but deleted it. I have also used get all actors of class, in order to get a variable from other blueprint.
here is my question:
https://answers.unrealengine.com/questions/371928/how-to-cast-a-variable-from-an-actor-to-a-characte.html