So last night I encountered some weirdness with Warwick's ultimate, Infinite Duress.

It seems to be centered around the timing of the ultimate against characters with a blink ability. From what I've observed if they activate their blink ability at the same time that you target them with Infinite Duress they will still shift locations as on a guess the suppression effect of Infinite Duress hasn't gone into effect, yet.

Happened in one game against a Master Yi who used Alpha Strike right as I used Infinite Duress on him.

Happened in another game against a Kassadin that tried to Riftwalk to avoid getting ulted by me.

Things I am not quite sure about as the events unfolded rather quickly.

1) Are they suppressed after they appear in the new location?
2) Do they receive the damage that they should?

From what a I recall Master Yi was not suppressed which cost a teammate his life in that encounter and Kassadin was suppressed as the Infinite Duress animation continued to play around him while he stood in place despite the fact that graphically I was a Riftwalk's distance away from him.