I got a theory that while in the jazz hullisination, Poppy and Branch kiss in the weird dream and so when it was over they felt super weird about what had just happened cuz they LEGIT and I MEAN LEGIT, look like they feel weird now.

my other theory is that they did something to make one of the tribes hate them, and so they were sent in a bubble away from them and poppy felt bad and branch was just dispointed and so they either look like they did some romantic stuff like, Kiss. or either they're both sad