Annie turret aggro glitch

I was playing a game last night, and I get dove by a Draven / Annie, Annie was just out of tower range and Tibbers got agro first. I was sitting under tower for probably 4-5 tower shots, With Draven under tower attacking me, The tower was hitting Tibbers the entire time and Tibbers was hitting my support just inside tower range. In order to recreate this I'd say you would want to drop Tibbers on the enemy champ with Annie outside of tower range, then leave Tibbers on the outside of tower range, have the secondary enemy champ autoing the whole time + he flashed directly under tower possibly dropping the agro back to Tibbers. I was playing Jinx if that makes a difference. .. Sorry for repost, pretty sure someone down voted without reading the post. Or it belongs in bugs and glitches, I'll put it there too.