Champions Disappearing in bushes !!!! like total gone when they enter bushes...

was playing hexakill 3 of my team where chasing a near dead gangplank<we we right behind him, lissandra then me then another team mate in a row> so GP enters bush and Liss glacial paths to tele in front of him <she is ahead of me in the order> she teles he is gone then i walk thru the bush no one then last teamate no one also no sooner we are all thru GP runs out the side we enter bush from and runs.......... how did he get there we went thru the bush and he was not there ....... and the way we where moving there was no way he could of flashed back into bush because no one saw him on other side and there was no where for him to run into hide......... wth riot...

then another game i as ezreal am chasing a malzahar he runs into a small bush so i instantly use my Q into the middle where there is no way to avoid not getting hit <even when he was running> but instead my Q goes thru the bush as if no one was there, so i assumed he continued run so i entered bush and bang he was there why did my Q not hit him..... <and he did not flash back into it because he already flashed>