Why won’t the game let me mori???

2v8 is fun and all but the fact that I can’t mori at the end of the game, everyone is dead or escaped, is kind of annoying. I play solo queue killer and it’s so frustrating that my teammate is telling me to go for the mori and I just can’t? Like I really want to, especially when I think I have a cooler mori than my teammate, but the prompt to kill is just not there for me. Is this a known bug and they just aren’t doing anything about it or am I going insane. I’ve been able to get 1 single mori in all my matches. Yes everyone is dead or we catch one person when everyone is escaping and they have all escaped.