Autofill protection should be also activated while you're getting demoted

I mean, the autofill system is fine to me, i can still play other roles not at terrible level (but not decent of course).
But if Riot you decide to warning people he will be demoted if they lost the next game,
you should give him a chance to bounce back by guarantee them placed at his best role.
I just so confused n no ideas why my autofill activate all the lose streak and only the demote warning is on. I got autofilled at the role I am not willing to go. Is that kind of plank from Riot?
I do appreciated how you make the queue more healthy by this system but please,
some of us need protection in demote when we might actually tilted.