Our cat has been acting weird in the evening/early night

During the witching hours, and early in the morning she’s a super happy camper. Running all over the place causing chaos, then she sleeps most of the day, then starts waking up again in the evening to play. The last few days she’s been acting skittish in the evenings, hiding, and not wanting to come out. She’s eating, drinking just fine, using the litter box fine. Once it hits like 2/3 am she’s perfectly active. Just between 6/7 until then she’s been hiding from us, and not wanting to come out.