Oh yes. Very similar issues. Thought it was just me and continuinually fiddling with hardware that broke it. I was finding the server wakes up from a wake packet, but I couldn't get it to work. Having a keyboard attached and manually logging in and doing a reboot, gave a clean reboot. But I had to do that blind as my screen freezes on the login prompt (even before sleep) - presumably due to having intel_gpu_top plugin installed. I've set it to shutdown instead of sleep  - takes longer