Yeah, but apparently the fight was due to some political stuff from Japan. Bea allegedly cost Sadie a job and when they were together backstage shit went down. Kenny probably should have known since he's the one who would be most aware of Joshi goings-on, but I don't know if I can completely blame AEW for something they weren't involved in.
The belt is just lol though. In a weird way it's kind of great it happened to Jericho since it fits in with his gimmick/real life persona. I mean, I know when I heard the story I was like "yeah, that sounds about like something Jericho would do".
They have a spare belt, and they can always make another one so at least that story is just funny. You can't have people bringing in outside BS to your locker room and fighting about it. I would hope now that they are aware of any potential issues they will make sure it's not tolerated.