B.I. Essentials issue in MGA

Hello everyone! 

When using B.I. Essentials tool in Process Management app, there seems to be some problem with Item Assignment Status. Some items are displayed as "Added item" and others as "Assignable item" even though they are all implemented in exactly the same way. Some of them with literally one drag-drop into same operation. Refreshing also doesn't help. 

Does anyone have an idea, what the problem might be here?