The issue with umpire's call is, of course, goals can be ruled out when the tech says the player is onside.

FC Twente had this goal disallowed by the linesman. VAR showed the attacker marginally onside.

Lines were touching so stayed as no goal despite the tech result. pic.twitter.com/0IMhtntSij

— Dale Johnson (@DaleJohnsonESPN) December 1, 2020