To be fair, I think the forest player does touch it, and the ref makes a mistake of either thinking he didn't or not knowing the rules. But it's just a standard mistake that are made all the time, if we're invoking the offside phases of play there were about 30 before the goal.
I always have a second on twitter that I think "ah, they just don't know the full facts/reasoning/my version. I'll just tell them and they'll be sound". That soon passes when I read some of the conversations and exhausts is exactly right