The offside challenge is already stupid. They basically assess as- if a referee misses an offside, any goal scored thereafter is like a punishment to the offensive team and overturned. There's literally no winning if your the offensive team- if you score, it's a dead play anyways and your punished. It actually deters productive play.
It's a laughable rule to have in place- and they are enforcing a stupider rule to fix a inherently broken one.
They should simply either remove the offside challenge altogether or create some restriction on when it can be used (like only in the event it actually impacts play...not minutes after the fact).