It’s not really 9, and not a new bug…
Sometimes the queue bugs out, and it tries to add a player that may have had connection issues or in some way dragged out his joining into a team, while the system got a replacement for him. Whatever the reason this happens, he is basically dead from the start. Spawns and blows up or is just a gray name, but DOES NOT actually join the match.
This happens a lot in raids, where the system adds the 5th player but he is simply grayed out and dead.
When this player is added as dead, he is ALWAYS last on the list, under the bots (like you can see on your screenshot) and in the end will have 0 points because the system kicked him out at the start of the match.
Thank you for the clarification