[GAMEPLAY][VISUAL] Toxic Shot indicator remains visible indefinitely if champion leaves your vision

If you poison somebody as Teemo, and they leave your field of vision, they will still have Toxic Shot's animation over their head when they come back, even if they recalled, TP'd etc. It will get removed if you poison them again, and this new poison instance runs out.

How to reproduce:

1. Pick Teemo into anyone
2. Use Toxic Shot on them
3. Have them walk a little back until you can't see them anymore, while they are still poisoned
4. When they re-enter your vision, observe how they still have poison animation over their head

I'm not 100% positive it happens every time those conditions are met, but it happens very, very often (even few times each game).