Since this is a Pi-Hole forum, it would be difficult for us to give you advice on whether this should worry you. It does seem that Pi-Hole is working as intended and blocking this domain found in your gravity list.
Since this is a Pi-Hole forum, it would be difficult for us to give you advice on whether this should worry you. It does seem that Pi-Hole is working as intended and blocking this domain found in your gravity list.