On the most recent clover update, reboots are to a black screen on my 6700K/Gigabyte Z170MX-5, Asus 1080 Ti 11GB, 48GB system. I haven't been able to do updates to High Sierra since 10.13.3 without rolling back to that.
Anyhow, bought a new Samsung 1TB SSD and decided to go for a fresh install...