Is the snake at or around 1000gm ? In my experience they hit this point and 'puberty' kicks in and they turn into frustration monsters. They seem to stop feeding at this point for a while and then start back up all of a sudden. No rhyme or reason, if the animal is over 1000gm it could be just breeding season stoppage as well.

Just in case double check all your husbandry and make sure everything is good I might also use a different thermometer hygrometer than the one you typically use they often change after a while (dust and dirt change the resistance and therefore the readings.)