When he received the ball he was running towards the goal so she did not flag thereby allowing VAR to make the decision if Berny scored but he ended up near the dead ball line and started to go back. At that point Bernies attack had ended so she flagged, the ref ignored her, Bernie passed it back and the rest is history.
OK it looks simple Bernie passed it, Cancelo scored but what if instead of shooting he passed to Sterling who passed to etc etc who then shoots and we score. How far back does Var go.
Anyway, did you see the look she gave the Ref :-) I get them off Mrs Mist all the time/