If you say so; didn't see it on the replay they showed where the linesman was. Everyone was running where Milner/Mane was, but as mentioned not really relevant to whether he was offside (which he obviously was).
Would have been interested to see how the Salah play went as it was a pretty similar situation, but eh. There was also the Ogbonna tip out for a goal kick there along with the other things that linesman has missed. He's just having an all around terrible game.
Liverpool need to be sharper in the final 3rd regardless. They've been in plenty of dangerous positions, but they'll lose this game if it goes as it has with their set piece coverage (the worst I've seen in a long time).