You're doing great! But sorry, it's not usually a temporary thing or glitch.
. Eat a big piece of cake or something carby and you might find yourself back where you started.
It isn't always easy....sometimes Diabetics can suddenly spike if they're ill with even a cold. It depends on the person. And how many beta cells your pancreas has left and whether your cells are responding to the insulin you produce, etc. Diabetes is such an individual thing.
Sounds as if you're doing all the right things. Keep it up!