Waise I was thinking and I feel like an excuse for that could be that Sanki traumatized him so much that he deleted D-fam and only remembers Pallavi as a link to his past. Or his last thought before the accident was going home to Pallavi or guilt for abandoning her , something like That.
Oh, like Pallavi and his responsibilities towards her being the biggest thing on his mind, and thus he remembers her?