I am not a medical person so I can only say what I experience over 60 years of diabetes.
First thing to say is Don't worry. Talk to your healthcare people about this. I think it is that you are well controlled and your body is anticipating the time you eat. I suspect you have a routine of eating at the same time every day. I eat at the same time every day and because of this, I take less rapid insulin or (conversely) if I eat at an abnormal time, I have to take more.
I hope this helps but certainly don't be too alarmed by these numbers and talk with your support staff.