Autofill System...

I have been playing lots of games as of late, and recently (in the past couple of days) every single time im not autofill protected I will get autofilled to support or jungle (I queue mid/top). This is after having stopped queuing mid/jungle due to me getting jungle (my 2nd pick) nearly every time. Has anyone else run into this issue? Before a couple days ago, i could go 20 matches without autofill.