Resolved:

Went into Chrome task manager and killed every process one by one until the page brightened up. Now looks wonderful.

Happened again. repeated the above process and it solved it again. I think it may be Ghostery extension.

As a background:

This issue happened after an upgrade from Windows 10 Ent 1709 to insider 17020rs pre release 1400 (Cannot be sure of previous versions as recalling from memory.

Happened the second time after upgrade to current Build 17604.rs_prerelease.18209-1422

This issue is reproduced by closing and re-opening Chrome. By going through the task manager I can verify that the GPU Process seems to be the culprit. After ending every process and then restarting GPU process the issue disappears.

Without killing any other task restarting GPU process three times eliminates the problem.

Can anyone explain why it takes killing the GPU process three times to rectify this problem?

Unable to reproduce the issue on Win-10 having processor Intel(R) Xeon(R) using chrome reported version #64.0.3282.167. Observed that chrome did not look dimmed.
As ET team doesn't seems to have Windows 18002 having processor Intel 4000 and radeon 7700. Hence, adding label TE-NeedsTriageFromMTV and TE-Hardware-Dependency and requesting someone from MTV team to please have a look into the issue.

Thanks...!!

Archiving old bugs that haven't been actively assigned in over 180 days.

If you feel this issue should still be addressed, feel free to reopen it or to file a new issue. Thanks!