A recent update of Google Chrome on Mac computers has introduced an issue where a Flash Player screen will flicker. The flickering continues until the page is refreshed.
This problem is resolved in Chrome build 55 which is scheduled for release on Dec. 6th.
We have also noticed that turning off Hardware Acceleration in the Chrome Settings page will also stop the flickering issue.
Update: We can confirm that this has been resolved in version 56 of Chrome.