Happens to me too (kernel 4.17 ubuntu 18.04), especially the first boot of the
day I always get black screen after modeset. I haven't tried with KASAN and
can't get any log but I suspect is the same issue.

Asrock ab350m pro4 - firmware 4.7
PSU seasonic s12ii
ram 2x8 gb kingston hyperx fury 2666
CPU ryzen 2200g