System Information
Windows 10 x64
GTX 950M
417.35

Blender Version
Broken:
Date: 2018-12-31
Hash: 4d795cee4938

Short description of error
Viewport doesn't seem to always update material changes. This seems to happen in both render and material mode using Eevee. Zooming or rotating viewport seems to update the material. Happens fairly often ,but can't really give exact steps to reproduce. Seems to happen when adding, changing, linking, or unlinking nodes.

Washed out

Color after zooming