Feeding response can change depending on a variety of factors. I wouldn't sweat it. A few times when younger, Behira had me put the rat down and then ate it anyway.
These days, I can't have it in there for more than 5 seconds without it getting nailed.
However, I am now feeding every three weeks, not every 1 and then 2 weeks.
Keep up the good work. Love his look; so clean!