when ballooning an exploded assembly in a drawing, the balloons point to air yet call out a part that exists in the BOM. When the balloon is forcibly attached to the part, it then shows a ? mark. In fact the balloon attachment does not seem like its actually grabbing the part. Its seems like the part is not on the screen where it is displayed. weird.

UPDATE: this is happening in views that are not exploded as well

any thoughts?