Drifting in and out of sleep

While talking to my friend last night in call, i noticed she mentioned how i haven't been responding, and that i fell asleep and missed a couple minutes of what she was streaming, and this isnt a new thing to me, its happened before where im talking to my bestie and i wake up on the couch in the morning, the only one in call with goodnight messages in chat, how often does this happen to yall?