Sleep cycle

I’ve heard that when you relax the baby is more active and when you are moving around the baby is sleep. In my case my baby sleep when I sleep and wake up when I wake up which is weird she is so synced with my body. Am i the only one who experienced this? I’m not complaining because I don’t want to be up all night bc my child is kicking. It’s been like that since 32 weeks. As soon as I sleep she sleep and the moment I wake up she start wiggling and moving. Babies are amazing