Biphasic sleep, also known as natural sleeping pattern, helps a lot, and not just with weightlifting. In old Europe a custom was to sleep at sunset for a few hours, then rise for a snack, or to catch up on letters, or perhaps a midnight stroll to visit neighbors briefly. Then back to bed until sunrise, followed later by another short sleep in the late morning or afternoon.

It's likely either electrolyte balance like you said or a macro imbalance. Is he carb loading?

jew, child rapist, woman beater (((tate))) is alpha

???