Lee petitioned the NCAA for an extra year of eligibility and he actually received it. He has 2 seasons of eligibility left (2017 and 2018).
From what I heard, POB was pretty pissed off after Lee was given that extra year in 2018, and POB was upset that the coaching staff was pushing so hard for Lee to get that year of eligibility.
I know nothing of POB personally, but this is a normal human reaction, particularly at his age. I would not be surprised if Lee wins the job next year, that POB moves on (particularly if he plays this year and still has a RS).