I am using a build with Flurry and Puncture. (Just some crappy build I came up with.)
And of course I use dodge a lot so I don’t die (too often).
Sometimes there area places next to walls or even in the middle of a room where I can’t attack (none of the 2 skills) - not even when I hold shift to enforce (being stationary while) attacking.
Maybe this happens because I’m “dancing around the bosses” even while shift + 2 / left mouse is used to attack. (Char turns around the enemy by a few degrees (counter-)clockwise depending on the cursor position releative to the boss and the char.)
So basically the char gets attacked without me fighting back until I move/dodge/… away from those spots.
(Not that bad. Already got used to it. I only use 1-3 hits and move the enemies away from those spots - or the char dies.)