32 month sleep regression ???

Is there a sleep regression around 2 years & 8 months old??

My daughter has ALWAYS been such an awesome sleeper. She started sleeping through the night at a month old (12 hour sleeps).

Bed time is between 8-8:30pm but she usually doesn’t actually fall asleep until 9pm or shortly after. She usually sleeps all night until 7:30-8am. She only has one nap during the day & that’s after lunch at 12:30. She’s up by 2.

But for the past week she’s been going to bed at 8-8:30, falling asleep by 9 & waking up at 3am where she absolutely refuses to go back to sleep but cries because she’s tired. She normally ends up falling back asleep at 6am & is up at 8am.

She has a 5 month old brother but he’s already sleeping through the night so it’s not like he’s waking her up & that actually hasn’t been a problem. He’s only woken her up once & that was when he was like 2 months old.

Is this just a normal phase?