Fiddlesticks in ARAM

I sometimes play ARAM to chill, but then i see fiddlesticks in enemy team that has e in that tiny area that silences everyone and deals damage(sometimes up to 2 times). My problem is not with the champion, my problem is the drop rate of it, i remember times when i played 3 aram games and had fiddle in enemy team 3 times in a row. I believe there is a bug with fiddlesticks in aram which causes him to drop easier, because i never see yorick, hecarim, kha, ahri the same amount like fiddle.
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