Pivot does not stay with grouped actors when surface snapping is enabled

Surface snapping causes the pivot to move to a different location away from the grouped items. The pivot can be reset by ungrouping and regrouping, but the pivot moves away from the group when the group is moved again while surface snapping is on.

1. Place 3 actors into the viewport
2. Group the 3 actors together
3. Turn on surface snapping
4. Drag the group around and release mouse

Group selection move, surface snapping on, pivot doesn´t move