Does a caloric deficit cause sleeping problems? I've found conflicting claims and would appreciate some guidance.

I've had trouble sleeping for 2 days now. All things in my life are still the same except my calorie intake which is at 500 calories bellow tdee. The insomnia started exactly on the day I began, how long do I have to just grind throug8h this till my body adapts?

I tried researching online but couldnt really find anything about my case. Tho i read somewhere that on a deficit your body is staying up longer as a survival mechanism to forage for food? However I read another thing saying a deficit makes sleep better because the body tries conserving energy? So i am pretty lost.

For context my tdee is 2200 so I am eating 1700. Meal time is 12pm and 7pm. I have coffee, 1 cup in the morning same as I have been doing for 10 years now.

Again the only variable in my life that changed was the calorie intake.