How to reproduce: [WARNING do not do this on a real project, make a new project to test this]
Make a blueprint interface, name it, name the function in it, make an output (this will add a return node in the event graph), hold ALT and click on the connector between the two nodes.
You are now stuck. You can’t delete the return node and they’re not connected and you can’t reconnect them.
Imagine if this was a function that you had already implemented everywhere.
Is this a bug or is there a way to correct this without making a whole new function?