I was given a HBA1C of 105. Of which I'm not sure is correct, I used to have this issue, but now it's gone away strangely. I would concur with
@bulkbiker your liver may be dumping excess sugar, to use as fuel.
I don't understand why BG dump decreases when you cut our go low carb. My carbs are extremely low, not even 15g of carbs, probably 10 max! A lot lower than 200+ carbs a day that I was doing...
I ALSO starteed heavy weight lifting and became more active... it was magic