Bugger, this was what I figured out (Laird to Atkins, DPP switch Atkins and Constable, Edit trade again Atkins to Dawson)
But Warnie knowing it means they'll fix it soon I'm sure. Annoying.
Not a bug. Warnie said in his weekly video that the team is working to get the feature properly implemented as it is in Supercoach. And while its often a joke that Warnie runs Fantasy, he just speaks to the Genius Sports team that runs the game.