I found cutting out carbs for a bit solved this for me.

Your body has the ability to produce its own sugar from protein to stabilise your blood sugar levels. If you feed it a tonne of carbs it gets lazy, but then you have wonky blood sugar levels when you sleep and in the morning. Your energy also only lasts a short time around meals.

So cutting out carbs completely for a bit, at least for breakfast, helped me to stabilise my blood sugar levels because my body began to make its own again