No matter how many times I get autofilled into support, I don't get autofill protection.

Support Vlad https://image.prntscr.com/image/7n7VNBMeT7qDoQUu-GXQKw.png

No autofill protection https://image.prntscr.com/image/4Euz1aBVSJ25i_kEqwPm1w.png

Legit, I've been autofilled all day today, luckily my friend likes playing support so he'll just give me his role, but my god. It's getting really old having to play support over and over now that he's gone to bed. Can someone explain to me wtf is going on?