Apologies as I can't provide more details, as its happening to one team and they just said "eh I'll just ignore it".
But basically they try to close their sprint and they get the warning that "subtasks that don't have story points will affect the next sprint" or similar. But as far as I know you can't even add story points to subtasks because the backlog only shows stories/tasks.
From what I can tell, the hierachy looks fine too, its not like I have a subtask on the same level as a story/bug.
Anyone seen something like this before?