MacBook Pro battery problem

so I don't shut down my MacBook Pro 2019 a2141 over night I just simply put it on sleep but I have noticed something strange it happened with me 2 times when I opened my Mac in morning it lost all the batter like battery went to 0% from 80% for no reason like there are not even any programs running or something heavy in the background and when I checked the battery usage it showed at 80% at 6am but after 6am battery starts draining for no reason like I don't even open my Mac at 6 am in everyone was sleeping that's it please provide any solution