The question about that poor run is how much it can be attributed to his personal situation (the failed transfer) and how much it was caused by problems in the squad. In 19/20 he played usually ahead of Hakimi on the right wing, who was brilliant at going forward and playing together with Sancho. Hakimi was replaced by Meunier, who is much different, especially as he just performed absolutely terrible. Later in the this season Sancho moved to left wing were he could play ahead of Guerreiro who is much closer to Hakimi in playing style than Meunier is. So basically for that half season Sancho lacked a passing option he was used to and needs to have to perform at his best level.