Rico was further forward per instructions, and tried to get back. Stones is meant to stay wider and have a look over his left shoulder to see if there is a runner on the far post, specifically because Lewis will often not be able to get back to cover fast enough (he can’t be in two places at once, despite the expectations of some blues on here). He can easily run to close the man in the middle of the box from that wider position, if needed—and Dias will cut any ball to the middle runner, if he can. If he can’t, Stones isn’t going to be able to do it, so Stones is there to close, not cut out, and tucking closer to the middle runner is entirely unnecessary. It means we have two CBs covering the same runner, with only one actually being able to stop a ball from getting to him.
The goal was mostly down to Stones taking a poor line and thus ceding the great position for a tap in to the Wolves player, as Lewis scrambled back from his more forward position, which Pep has told him to take up in certain possession situations.
I genuinely don’t understand that of all the players this season, Lewis is one being singled out for being not good enough. In my opinion, on average, he is in our top three best players for the season thus far.