Question mark because it probably doesn't count, as I don't know what qualifies as a true leitmotif here. Variations can exist, but how much it's allowed to be varied, I still don't know. Anyway, there's very quiet strings here at around 0:52-0:56 that has (mostly) the same notes as Don't Forget but in a different key.
Green notes are from Gingerbread House. Blue notes are from Don't Forget, but I transposed it lower. Except for the first one, they both share notes (GH adds an extra note, which is red here, so it stretches the motif).
To me, it seems to invoke the same idea... but I'm guessing it's too varied to count as a leitmotif here.

