Mac OS 10.14 (18A391)
Intel Iris Graphics 550 1536 MB
Blackmagic Radeon 580 eGPU
Blender 2.8 Alpha 2
Date: 2018-10-12 22:53
Short description of error
Black noise appears on objects that have SSS enabled in viewport (LookDev Mode, Render Preview) and in rendered images. Screenshot attached.
Noise disappears if one quickly resized panels but reappears instantly once the panel size stops changing.
It might be noteworthy that I checked if disabling the eGPU within Blender fixes the situation which it sadly does not.
Exact steps for others to reproduce the error
Assign either a principled shader to an object or a SSS-shader. The issue appears in both cases.
.blend file attached.