I have autohide enabled for my dock and it seems to be a feature (at least in OS X 10.11.6) that, when I drag my mouse to the bottom of the screen when on a full-screened program, the dock will not display until I have attempted to drag the mouse down at least another time.
This problem does not occur when I am not on a full-screened program; the dock displays instantly.
I'd like my Mac to have the functionality of displaying the dock as if I was not ever in full screen mode.
Edit: If it is important, I use HyperDock. A change to this also would be sufficient for me; I have a license.