With patch 7.2.5 a nice undocumented change that came in resulted in many holiday items that were previously Common (white) are now Uncommon (green). This has resulted in many challengers being red-flagged.
It is important that you remove the items from your character ASAP.
I’ve gone through to reset most flags, however, I don’t believe all characters will be updated to reflect the new uncommons that were equipped. I’ll be doing another pass tomorrow after our big nightly job is done and attempt to fix any new toons that get flagged again.
If you see your character incorrectly flagged, please let me know at Stone -AT- WoWChallenges.com. All I will need is your toon, realm, region and I can go have a look. When you send me your character information, please make sure you’ve already unequipped the gear so that you won’t be red-flagged again.
At first we thought this change only applied to Noblegarden cosmetic items, however, I’ve found cases of this applied to Brewfest and Pilgrim’s Bounty items. There are still cosmetic items that remain Common (white), however, based on this change I highly suggest you unequip any items that are marked “cosmetic” in case this happens again.
Header image credit: http://www.wowhead.com/noblegarden-2017-guide