Our bodies are not machines. Any changes we make can take days to settle. Or they dont settle. Mine does what it wants, no matter what I do habitually. Bodies are weird.
You may need some salt in your diet, or just give your body time to catch up with changes. This is why type 1's have it so very hard.
Bodies change from moment to moment, its just the way it is. There is no formula which works the same way, every time, in diet or exercise and blood sugar levels.