When you won't trade roles.
Got autofilled jungle last night and of course nobody would trade. I can play any of the other roles fine but jungle is not my thing. If this happens don't expect a crazy amount of ganks from your jungler. I do ok with warwick as he can clear pretty fast and I have practiced it as to not autolose if I do get stuck with it.
Overall I did ok, ganked bot a few times successfully before our towers collapsed. Of course their jungler was better and top would not shut up about how bad I was as he was going 1/5. Makes me feel for you jungle mains and this was only like my 3rd time jungling.