It’s hard putting yourself in the position of a fighter, who may have been struggling & down a couple of times, when they may start to feel OK & want to step in having landed their best punch; then get tagged. It had echoes of the 1st Ruiz fight.
With hindsight, time appeared to be on Joshua’s side & signs were starting to appear it may have been about to start swinging in his favour, going into later rounds.
However, he did jump in & was beaten to the punch, as he had been all night that far.
Sharpness, timing & age all favouring Dubois, in a thoroughly deserved victory.