called custom functions do not update parameter names upon compile, must be replaced

Parameter names do not update on custom functions that are already called in event graph after compiling blueprint.

1. Open Editor (any project)
2. Create new blueprint
3. Create new function
4. Add input parameter, name Test
5. Switch to event graph
6. Drag copy of new function into event graph
7. Note parameter name not updated
8. Compile
9. Note parameter name hasn't updated