You look at the ratings of the United players are they are significantly higher than Southampton, who arguably played better for longer periods of the match.
Rojo didn't have a good game yet he rated much higher than Bertrand, who according to many played well and much better than Rojo at minimum.
And nowhere can I see from the WhoScored info that Lingard loss possession 12 times. Unless you're adding up misplaced passes (9 according to his pass percentage) and times he lost possession because he was dispossessed (1) or had bad control (2).
So in reality, the "stat" that he was dispossessed 12 times is false.