Contact stays on active contact list even after completing story arc.

[Rikmach]

Max is a contact in the Incarnate Dark Astoria storyline, His story arc is structured in an unusual manner, there's several missions you can complete that make the final mission easier- but they're all optional, and you can choose to complete the final mission without ever doing them.

 

However, this causes a problem: If you do this, Max stays on your list as an active contact, even though he no longer offers missions, and should be put on the inactive contact list.