Hope this helps....
Years ago back around 1999 I had a Colombian/Hog island cross...she was gorgeous...and so light pastel coloration. She was ferocious..LOL...at least I thought so....every time I would walk passed her glass tank she would strike! She struck so hard her mouth would get all bent up...I was worried about her getting hurt.
I tried the put the t-shirt in cage trick and handled her with gloves and just tried to get her to settle as much as I could...
I later sold her and still regret it today....what I think happens is common in some animals....
I have had a few since then that showed this same agressive behavior...and although I could be wrong here....I think they go through growth spurts and just need to eat more at this time.
So just try and feed her a little more or larger prey...a 4 foot snake should easily take a medium rat...but maybe try a large....then about 10 days later feed her again....
Temps are also critical and if in glass tank with a light on top she may just be too hot...
Make sure the cage is at least a 55 gallon tank for her size...and also if pets are around that could also be a factor....
Hope this helps....let us know...Andy