Clean Slate Glitch?

I haven't experienced any timing difference with jumpcasting any of my attack/support skills (DS, AB, DP, Strafe, AR, Inferno, Puppet). Do you have a specific example?

Could just be key settings, I've mainly had trouble with Rush (which will only jump cast when there are no targets) while I found DS to be pretty easy.

I don't have much experience jumpcasting as a mage, teleport always seemed like a better choice.