No need to be concerned, it's working fine with Arch Linux (Linux 4.20, mesa 18.3). It's still a problem with Ubuntu 18.04.1 (kernel 4.15), but Ubuntu 18.04.2

No need to be concerned, it's working fine with Arch Linux (Linux 4.20, mesa 18.3). It's still a problem with Ubuntu 18.04.1 (kernel 4.15), but Ubuntu 18.04.2 will hopefully be more stable with kernel 4.18.