I don't see why an open source project would care one way or the other? If the prompter owns it then they are licensing it by submitting it to the project. If no one owns it then there is no problem.

We don’t know yet because that’s an unresolved matter. The question of ownership is currently undefined as far as I understand. It could be that after an actual legal decision the ownership doesn’t end up being one of those 2 cases, for whatever reasons the judge would decide