Here's the rule according to the laws of the game
"A player in an offside position receiving the ball from an opponent who deliberately plays the ball, including by deliberate handball, is not considered to have gained an advantage, unless it was a deliberate save by any opponent. "
The first goal in this game (1:10) is an example of where a goal was overturned because of this, he plays it just as deliberately as the defender tonight, who lifts his knee up slightly and is clearly trying to block the header.
Agree. We should have gotten the goal. Wrong call by VAR.