First things first I've been growing my plants outdoors.
The last couple of days my Neps have had some leaves starting to yellow. I know the the usual suspect is too much sun, but the level of sun has not increased; they've both been getting full sun for over a week now with no symptoms till now. I then thought it could be that it has quite dry lately, but then I realized the pitchers are just now producing fluid, and I doubt they would if humidity were the problem, one is even putting up a vine and a new pitcher that should open soon. Also, it is only a leaf or two per plant, not all of them.
Pics of the yellowing leaves:
And the fine ones:
One thing that I must note is that the yellowing seems to happen only on leaves that have had dead pitchers clipped off (though not all that I have clipped from have yellowed). Should I be concerned?