It was definitely a thing in that case. If a DH was in meta, their head was above the wooden plank so they still got hit, but I just remember there was a slight recline just behind the wodden thing so all the DH had to do in that case was to simply move a few steps back to be be fully hidden. There were multiple ways to go around it tho.
You can see in this video:
He’s got this buff on him to make his player model smaller.