I can confirm this issue, on a Radeon RX 580. BogDan.
- Bug#914267: mesa: [regression] with Mesa 18.2.5... Axel R.
- Bug#914267: mesa: [regression] with Mesa 1... Bogdan Vatra
- Bug#914267: mesa: [regression] with Mesa 1... GSR
- Processed: Re: mesa: [regression] with Mes... Debian Bug Tracking System
- Processed: Re: mesa: [regression] with Mes... Debian Bug Tracking System
- Bug#914267: mesa: [regression] with Mesa 1... Michael Biebl
- Bug#914267: mesa: [regression] with Me... Andreas Boll
- Processed: Re: Bug#914267: mesa: [regressi... Debian Bug Tracking System
- Bug#914267: marked as done (mesa: [regress... Debian Bug Tracking System
