Arrow for Oriannas ball does not dissapear

In a teamfight I (Orianna) tired to shield my teammate Rengar who got caught and pressed his ult to escape. He died anyway but the indicator where my ball is (little arrow) stayed for the rest of the game in the direction where Rengar died. If i moved my ball somewhere else i had 2 arrows, 1 in the direction where Rengar died and 1 where the actual ball is. This was really confusing please fix it.