I've noticed I have very vivid dreams when going back to sleep in the morning after some time awake (~1hr) - often a split like 6hrs / 1.5 hrs when my partner heads out

my theory is that the main "cleansing" cycles are complete by this point and then the subtler psychic strata are more gently accessible. Kind of like how a river in the peak of snowmelt will be devastatingly strong and pull everything along with great force, but towards the end of the year the trickle of the stream lets you see the stones and plants under.