Karthus-New Rift Bugs

i have found that Karthus is bugged at The new Rift after i got blue and died the blue buff circle was still on me even tho i died and lost it, and also i recalled while the minions were atacking me and the animation and the timer of the recall were working but the blue aura dident and after the time ended i dident recall so these were some bugs i found out hopefully u read and fix it/