Last meal of the day ideally should have fibre in it like oats or nuts to slow absorption and any insulin spike. When you fall asleep your body releases Melatonin to help you rest and sleep hence from your profile your sugars drop nearer to 3 as we burn calories overnight. At 3 ish this may be...
It does seem to work better and last longer but I had to halve my normal dose and switch to taking it when I get up then it does not impact my daily activities