[GAMEPLAY] Anivia's chill gets cancelled by itself

I noticed this in a game just now, because it blatantly was the bug I kept imagining was happening; the scuttle is right in the middle of the ult, doesn't move outside of it, and I throw the E after the ult was placed.

It looks like there's a problem with the chill from the Q and R overlapping, where the Q chill ending temporarily stops the R chill.

Reproduction steps:

1. Damage an enemy with Q
2. Follow up with R (this is where I don't know the exact reproduction; it seems you need specific timing because it doesn't happen every time)
3. Attempt to get a double damage E while the Chilled debuff has disappeared.

The frequency isn't very high since the timing doesn't always line up, but it's happened often enough for me to notice this multiple times in the last couple of weeks. I'd say it's a big issue considering how much damage you lose out on in this scenario.