Hi! I’ve checked with my team, and they confirmed that the issue has been updated and should now be fixed.
You won’t need to restart the game — just update it, and everything should be cleared.
Please download and update to the latest version, then: Return to the church, chapel, or mausoleum in the cemetery area to retrieve the item and complete the quest.
Let me know how it goes, and I’ll be happy to assist you further!