Multistrike is bugged for Ice Crash of Cadence

I noticed that as I hit red maps and mobs had more HP that my Ice Crash of Cadence attacks would stop doing damage like I missed (I have WELL over 100% hit chance) I have 8.3 attaks/s with Multistrike (pob says 2.9 million dps)

With just normal Ice Crash I have 6.5 attacks/s and only 2 million

But when I map the normal Ice Crash blows the map up and kills things WAY faster. Each hit you can see Rears get chunked. With with Ice Crash of Cadence often they take no damage at all for the second hit

If I swap Multistrike for Volatility, Ice Crash of Cadence attacks speed drops to 5.9/s but the map clear is NOTABLY better even tho the DPS in POB is the about the same just slower animations.