https://www.reddit.com/r/hangovereffect/
This sub-reddit is dedicated to people who've noticed this effect for ADHD and probably depression as well. Drinking alcohol somehow causes the same 'reversal' of symptoms, either motivation or other mood problems. Lots of discussion as to what causes it - and questions/theories on how to reproduce without alcohol.
Alcohol causing sleeplessness, or sleep that's not the usual quality might be an explanation.