Sudden change in my 10 month LO habit

Since 6 months, my LO has been sleeping throughout the night till morning 5 or 6am. Recently, my LO just hit 10 month+ For the past 1 week+, we get her to sleep at 10+ ard 12 she wakes up once crying for a very short while, get her to sleep. She will start waking up again btwn 4-6am and we have to put her back to sleep. I'm rather concern if this is normal? Previously she was sleeping through all the way. Can parents please help share your experience? Thank you 💕