I think the drummer did a 'uunhh' in the space where the snare would have normally gone at beat 2 in the 2nd measure. Many drummers do stuff like this as they mix up their beats.

What is more concerning to me is the lack of timing in that loop. It starts fast - smooths out - then seems to really drag at the end of the loop.

At least, that's what it sounds like to me.