New reports as the issue is still happening:

I found a link on phoronix that describes with pictures exactly what is
happening:
https://www.phoronix.com/forums/forum/linux-graphics-x-org-drivers/open-source-amd-linux/1049483-amd-devs-error-ring-gfx-timeout

OS: OpenSUSE tumbleweed x86_64 updated (2019 03 23)
Kernel: 5.0.2-1-default
Desktop Environment: KDE Plasma (x11)
OpenGL version: string: 4.5 (Compatibility Profile) Mesa 19.0.0
GPU: AMD Radeon RX Vega 64 8GB

Attaching log files and dmesg after crash.