Nothing to see.
Didn't Milly have a go at Klopp at West Ham when subbed off and we then scored.
There's been loads of it over the years. In isolation it's nothing.
But in the context of Salah being an absolute mile off it for 6 weeks and clearly sulking with the manager because he's not starting, it's a little different and not a good look.
I can understand players not being happy at being subbed off in a game because their blood is up from playing and they're not thinking rationally, but when a player tries to avoid embracing the manager when getting subbed on, it isn't great.