Where did you get your N. belli from?
And how was it shipped?
I know that when I got my N. rafflesiana I was expecting to see a great decline in health and then maybe a pitcher or two like 3-4 months later. Actually after it arived the one small pitcher on it turned orange and died, but it started producing pitchers that same month. So it had a very quick recovery time. That also however might have been because of the way that it was shipped.
When I recieved it it was in it's pot and had a plastic cup over it. None of the leaves were damaged at all, and it's doing really well for me. However this is really my first lowland nep so I have no information on N. belli