Quote from Fungy
Messed around a little bit in beta and actually... it seems like Dashing Strike breaks your combo, no matter how fast you are. So does Lashing Tail Kick by the way. On my level 7 monk, just the Mantra and that Healing skill can be used within a combo. Attack speed around 1.50 if I remember correctly.
I noticed that as well and don't remember it ever happening in patch 9, but now I have to a lot more careful when I use certain attacks to not mess up my combos.