Do you have any specific ones to list or submit a bug on? Assuming "collar appearance helmets" means items like this one \aITEM -766142105 -302285139:Stoneweave Headgear\/a most of the ones I've checked all show hair. I submitted a bug for the one that doesn't show hair. Obviously this doesn't mean it's the only one as I've only checked a few helms. It may be easier to track down/fix if given an actual list of items that got broken.
It seems to happen with every one I've tried with all my characters and i know others can see it too since i asked if they saw my hair after i equipped the collar peace in the head slot. Azure Magus Collar \aITEM 2022328310 -1233629760:Azure Magus Collar\/a Crimson Magus Collar \aITEM -2113849192 1000611370:Crimson Magus Collar\/a Guarding of the Learned Collar \aITEM 919007016 -645698921:Guarding of the Learned Collar\/a
From EverQuest II Discord. 28th Caith Those are now delousing collars. 29th Devincean is there a ETA on a patch to fix the stuff the last patch broke specifically wearing collared hats removing all my characters hair? The bald look doesn't work for any of my characters