I've found that I start to sleep less when I'm working out too much - it's counter-intuitive, but that's what I've noticed in myself. The first time I noticed the phenomenon was when I was walking for 35-50km/day for several weeks in a row. I was sleeping less, more deeply but it didn't feel as restful. I bring this up, because maybe this is a way for your body to communicate it needs a deload week?
Alternatively, maybe try experimenting with afternoon naps, to add to your total daily resting period. Or examining your sleep hygiene may help (eliminating ambient light, removing electronics from the room, etc.). Finally, consider playing around with your macronutrients; I've personally found that when I up fat and pull my carbs down a bit, my sleep improves. Experiment a bit, and see what works for you!