I think the ref did play advantage for Brown’s foul on Walker, as the linesman was waving his flag furiously.
None of that negates the incompetence of the ref in not sending off Brown for his two-footed, off the ground, “tackle” on Foden, which could have ended his season and career!
I agree with other posters…How does Howard Webb justify that challenge not even being a yellow card, let alone a red?! In the meantime, kick a ball 5 yds away back to where the foul was actually committed and it’s an automatic yellow or, in the case of Rodri, dare challenge a player from the side and catch him!
In complete inconsistency between often reckless and violent challenges and the bullshit “technical” fouls is ridiculous. Players are getting more yellows for the technical stuff than the poor fouls these days, while some players are getting kicked to death and having to constantly play through injuries!