For the last few days, every time I get my first hit with Sona's Q in a game (not when I first activate it, but when it first hit a minion/enemy/monster), I get a small lag.
This happened on two different PCs with different specs and different OS (Win 7 & Win 8.1), and it happened regardless of my latency (it happened even when it was 70).
I've noticed this every time I play with a Sona too; regardless of where I am on the map or whether or not I even have vision of her. When Sona first hits something with her q, the game freezes for maybe 1/2 a sec. I've had my game freeze like this for a while now and I couldn't figure out why, but I'm sure now that Sona's q is the reason.
Just wanted to add my experiences to this because this bug has been going on for sometime.
It has been occurring since Sion patch (or at least I noticed it around this time)
It only happens on Sona's First Q that hits a target. Hitting Q at fountain does not trigger it.
Lane partner is effected by freeze as well. Cannot confirm or deny for opponents or other team members.
The "Freeze" is a dead stop for half a second and then a flash to real time. No "fast forward" into realtime if that makes sense.
Please let me know if any additional information or testing I can provide would help. Sona is my main support and having this resolved would be great.
