ID 163387 - Checkerboard pattern in viewer when 'Use GPU for viewer' is on

Noticed in 9.0v7.

Repro:
- Open Nuke or NukeX
- Add a constant node
- Change its colour to 0.15
- you will already see a checkerboard pattern but start zooming in
>>> the faint checkerboard pattern is very obvious

>>> this can be seen with other nodes as well but t is not that obvious.
Host(s):