Game crashing with blade vortex

I've been experienced problems with blade vortex, non critical build crashing the game with 20 or more blades while hiting groups of 5-6 monsters... its became very frustrating

Besides, auras seems to turn off during battle, all at once (i use 3 of them, blasphemy, haste and clarity) since last patch.

Need some advice about how to avoid this problems plis

I cast like 20 blades and move intro a pack, it seems i make some critical strikes and the game slow down a lot and then i get the message ''unespected discontection''... this used to happen it a jump intro a big pack of monsters, i avoid that, but now (since last patch) 6 o 7 mobs are enough to get a disconection very often.
I've the same problem with vaal cyclone, but for that i need to hit a hugue amount of mobs, meanwhile blade vortex just requiere a few


Auras seems to turn off in middle of a fight, i still dont get if there is a any pattern in that, its not me clicking the icon in the upper left corner, all 3 turn off at the same time