AHI increasing with 1000 kcal deficit and high protein , moderate fats and low carb diet

Hello everybody, im 6ft6 and 300 lbs and started my weightloss journey , i do strenght training and a high protein keto diet , since then my AHI from usually 0.4-1.0 increased to 1.0-2.9. I am waking up decent but i want to know the cause.. Im doing cpap treatmant for 1 month.

Anybody know the cause ? I upped my min , before it was 8. Maybe my preassure fluctuating too much ?