Full game crash -ARAM (everyone booted) twice

Twice we had a full ARAM game crash. Everyone was sent to desktop with bugsplat from both teams ( 10 players).

From what we can tell, when vel is doing his ULT, and YI does an alpha strike into champs/minions (couldnt really tell which since it hits alot) the game would exit. It looks like the ULT and alpha strike need to hit at least similar targets.