Reply to Generating ideas in your sleep

The past year, I've been working A LOT on my music production. What's been happening to me lately is that if I get good sleep, as I'm coming out of my REM sleep, when I'm still in the haziness of waking up (but eyes still closed) I get a melody popping into my head. It's always JUST 1 melody that, as I wake up, develops into 1 or 2 bars. Thankfully, my hazy brain does some of the work for me since these basslines are mostly "call and response" type melodies.

I've been able to continuously recreate the result after I've: worked on music for at least a week straight (at least 5 hours a day), not eaten 2-3 before going to sleep, and cleared my mind with some quiet time before actually trying to fall asleep.

Does this happen to anyone else? I've heard of other people generating ideas in their sleep, but I've never spoken to anyone about it.

Does anyone else get ideas from a specific source/ritual?