Darius REWORK BUG [CANNOT GET STUN]

Whenever I use my Q which is Decimate that has a channel time before executing, an enemy tries to use her W which is Ki Burst to stun me but the stun doesn't effect me at all.Moreover,when uses Ki Burst I see the "Stunned" indicator on .Not sure if can ignore any type of stuns while channeling Decimate but I will do some more testing later.However,so far cannot stun by using Ki Burst while hes channeling Decimate.