I'd say the opposite; given the way CEOs usually part with firms even after misconduct investigations, it needs to be very serious for the “not consistently candid with the board” to be made public (it needs to be mildly serious for it not be hidden under a veil of “resigned to spend more time with his family/pursue other interests/pet his llama" but instead openly be a dismissal where the board “no longer has confidence in his ability to continue leading”.)