Sorceress problem with combo

Hi, im practicing combo for PVE on succession sorc.
I have a problem with some combination, for example in the middle of the combo is: E (Crow Flare) -> Hold Space (Bloody Calamity) -> LMB to release Bloody Calamity -> Shift+E+LMB (To instant cast Dream of doom) -> Midnight Stinger -> Rest of the combo.
And here is a problem with instant Midnight Stinger after Dream of doom with LMB cast. It is not working that fast as on videos in youtube from year before (character for example is doing 360 degree rotation after releasing Dream of doom - it makes Midnight stinger delayed, and ruins the flow in the combo).
Was it patched some time ago, or maybe i understand it wrong?
PS: I'm even spamming Shift + LMB right after Shift+E+LMB (it is really 0.01s delay) and it is not working so I think it can't be a problem with my slow fingers
Thanks in advance for help.
Have a nice DAY!