@Ketho - I determined that this addon was the cause of taint based on a forum-suggested run script:
If there is an issue present it outputs the name of the addon causing the issue, otherwise it outputs a nil value. In this case anytime my frames failed to reload properly it output ShowRaidFrames. Conversely there is another macro that quickly causes the RaidFrames to restructure; maybe you can make it part of your addon to help bypass any taint?
The above just changes (and changes back) the class color option but it causes the raid frames to reload and thus forces an update.