Yeah, it's a thing. Some factors I've identified: How close you vape to bedtime - I try to leave at least 2h in-between nowadays, more is better, up to 4h especially for occasional users. How much water you drink - stay hydrated. What you eat - satisfying your munchies with unhealthy shit will definitely make you feel worse the next day.

Imo it's mostly down to sleep quality moreso than actual after effects of the drug. Tbf that's a big part of alcohol hangovers too.