Three quick thoughts.
1. Probably total normal behavior for your BP.
2. Have you tried putting the rat down and walking away? Shayna, my 9 1/2 year old BP was similar for a long time (see below). If she didn't strike right away, I'd put the rat down and walk away and it was usually gone pretty quick. If she didn't show interest in 10-15 minutes, I'd try again another day.
3. What size rat are you feeding and how often? How much does Phantom way and how old is he.
The last question has to do with appetite. Shayna used to get medium rats once she was over about 1kg (she's now about 2kg). I offered medium rats every 2 weeks as an adult, but she would still often refuse. I switched back to small rats (still every two weeks) and she rarely misses a meal (except in shed or her winter fast). She actually put on some weight because she was eating regularly, was more active, and strikes now 2/3 of the time. If she doesn't show immediate interest, or I guess the wrong hide, etc. I just put the rat down and if not in her winter fast, the rat is usually going down the hatch or gone within 30 minutes.
Frankly, if your BP is eating regularly, I like to say, "If it ain't broke, don't fix it." However, number 3 could be a factor.
Keep us posted and good luck.