As seen in the above images, 1 of the sequence diagram has a box to encapsulate all the entities inside and it even has a name tagged to it. But that seems to be the only sequence diagram with that particular box. Hence, the sequence diagram is inconsistent throughout.
Justification:
This issue is tagged as veryLow because only 1 of the sequence diagram has that box while the rest didn't have it.
As seen in the above images, 1 of the sequence diagram has a box to encapsulate all the entities inside and it even has a name tagged to it. But that seems to be the only sequence diagram with that particular box. Hence, the sequence diagram is inconsistent throughout.
Justification: This issue is tagged as veryLow because only 1 of the sequence diagram has that box while the rest didn't have it.