14 month of sits up but still half asleep

Our 14 month old baby sits up while sleeping. She makes no sounds, just sits up and wait for us to put lay her back down. She seems to be still sleeping because she doesn’t respond to us talking to her. We bedshare and she is not sleep trained. It’s scary at times. She has been doing this for few months now. Is it normal? Should we consult pediatrician?