Vision problem in ARAM [GAMEPLAY]

I was playing Cho'gath in ARAM against teemo. I had Hextech Sweeper and whenever Teemo threw down a mushroom near me, I immediately went to attack it. I could get one auto-attack on it before it stealthed (and even though my hextech sweeper was off cooldown), as it stealthed, I lost vision of it for half a second and if I didn't stop my character, he (maybe "it" in the case of Cho'gath) would walk right over the mushroom, making it explode. I wasn't using attack-move, but rather the simple attack command on the mushroom. This brief visible - hidden - visible thingy with stealthed items is extremely annoying and should in my opinion be fixed. It's quite infuriating to step on a shroom when you know exactly where it is and you even have a sweeper just for it.