People shouldn't be able to call a role in blind pick until everyone has connected.
While this has only happened to me once, I feel that this is a problem that should be fixed. I've talked about this game, where I called top and locked in trundle, only for a person who hadn't picked yet and didn't have anything shown in chat yell at me about how they'd called top first. Eventually I relented and actually had a lot of fun as trundle adc, but things like this shouldn't be happening. Maybe make it so that people can't chat until everyone has connected or something, I don't know.