Nautilus Glitch

In my recent game I was playing Elementalist Lux. I didn't see any bugs that I am aware of or anything with that skin, but I was playing against a Nautilus in bot lane and we were supports.

I believe that I snared him as he was coming to me with his pull (don't know the order of sequence there sadly :( ) but he walked around for about 10 seconds until he pulled again stuck in the animation of a pull.

He wasn't pulling, but his animation glitched out and froze like that, but he could still move around.

Thanks! :)