This is a HUGE bug. I'm surprised I didn't hear more about this on OS. It's arguably the biggest bug in the whole game.
I am commish of 4 dynasties and have the same bug showing up in both dynasties.
If you retire, and come back... it still happens. You can create a new coach. Still happens. Is there a fix? I would hate to have to tell these two people, tough luck... deal with it or retire.