Has anybody else experienced insomnia while doing the program?

My first round or two I definitely slept better. Probably because my body want used to regular exercise. At that point I can remember my body feeling comfortable to be at rest when I woke up like my muscles were happy to be resting. It was a good feeling. I slept full nights at that point.

Fast forward a couple more rounds. I feel like my body temp is generally warmer, maybe due to better circulation, which makes sleeping for me a bit harder being hot at night. I only sleep 4-7 hours a night.

I ask if anyone else is experiencing insomnia because another buddy of mine who is about 7 rounds of x in also has insomnia. Idk if it could be due to exercise or a diet high in protein. Thoughts?