Possible Trundle bug

On Summoner's Rift, I noticed a couple of times when I used Trundle's W on a Renekton enemy bot that it made him freeze up and not react, while the Irelia bot was free to dash and stun me to her heart's content. Being an AI issue, it's probably a low-key problem and I'm sure nobody will mind the free kills. But I'm not sure if it does the same in PvP matches.