[Gameplay] Stealth ward bug - Enemies showing up in two places on map at once

[Gameplay] Enemy champion showing up in two places at once on map - minimap and main map

While watching fog of war on the outside edge of vision provided by a stealth ward, an enemy champion suddenly came into view (outside of vision area) despite not being in that location in reality.

Simultaneously, the same champion came into vision on the minimap in a totally different location, halfway across the map, as she entered vision provided by a different stealth ward. The video in the link below describes the problem more effectively than my pros can. Video

Upon review of spectator view replay, the enemy champion's movement in the "phantasm" appearance matched the real champion's movement elsewhere on the map. The champion's position relative to vision provided by a stealth ward was not identical, however, as in reality she was much closer to the ward in mid than she appeared relative to the ward placed by jax.

I have not had an opportunity to replicate this bug.

I hope this proves helpful in diagnosing and solving the problem.