Can't save blueprints using custom macros from a macro library

I have some macros stored in a Widget Macro Library. I don’t think I ever had problems with them in the past. Now whenever I try and save a blueprint with a macro that comes from one of these libraries, the editor gives me an error that says “Graph is linked to private object(s) in an external package.” I’ve had to add the referenced macros into each individual blueprint to save them. Why is this happening?