Being given a new 3 year deal probably has something to do with it as well. He dropped off a cliff the moment that happened. Quite why we saw fit to tie up an aging asset for quite so long, I've no idea. Its not as if the heavyweights of Europe...
I predominantly play as a target man and have had numerous head collisions over the years where neither I nor the defender marking me have been "the aggressor".
It happens. Timing of a jump can be fractionally off - more so at amateur level...