Baby suddenly sleeping in?!

Andi

Anybody’s baby start suddenly sleeping in?? Since about 6 month our girl has consistently slept 12 hours, waking up between 7-8am. She’s 13 months now and the last two days slept until 9am, getting more than 13 hours of sleep. And this morning she didn’t wake up until 10! She slept 14 hours last night! Is this normal?? Should I be concerned that she’s sleeping so much? She also takes a 3 hour nap during the day.