It's long known that drinking alcohol disturbs your sleep. You're getting slumbery and probably will fall asleep easily but the sleep will not be as wholesome.
My sleep tracker registers terrible deep sleep and sometimes I jolk awake after the buzz wears off.
Same here. Perhaps this is something that doesn't happen to people with a robust tolerance, but I'll never test that theory. Maybe before cell phones and Netflix, people just slept a lot more to compensate.
Could also be rapid change in blood sugar waking you up as well. Happens to me too and then im wide awake for 2-3 hours.