3 AM, pardon my expression, is well known as “the witching hour”. my basal rate is almost double from 3-6 AM.
dawn phenom is one issue, but what does your CGM say at 2 AM? anything below 100 mg/dl could cause a liver dump (look up somogyi effect) in my opinion, if you are sensitive, anytime you get a little low at night your body can dump liver sugar in a well meant (in non-t1’s) attempt to raise blood sugar. in really sensitive people it might be better to run in the 120-130’s at night to keep this from happening.