I'd like to report a bug

http://img3.wikia.nocookie.net/__cb20130217212737/leagueoflegends/images/7/7c/Widow_Ward.jpg I use a very specific ward to keep vision on the map and I've noticed a bug roaming around and destroying said wards 2 - 3 minutes after I place them The bug I am reporting resembles this http://orig09.deviantart.net/7560/f/2014/018/7/4/elise_the_spider_queen__spider_form__by_destinyarchon-d72ne1e.jpg

Please help me get rid of this bug it is disrupting my ability to keep the map lit