Chrome OS OOBE graphical artifacts after screen rotation

On Chrome OS eve R71-11101.0.0
(1) In OOBE (fresh install)
(2) Rotate the device (or screen via Ctrl-Shift-F2/Rotate) repeatedly.
Expected: Screen looks normal
Actual: Screen has gray boxes (see attached photos)
 

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	IMG_20180927_171340.jpg 439 KB View Download

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	IMG_20180927_171348.jpg 788 KB View Download