This issue isn't very important at all and feel free to ignore this completely, however I might as well post about it. Certain hats do not appear on the character model while on Wonderland.tf servers. One hat where I can confirm that this is the case is Le Party Phantom. This hat does is completely nonexistent in-game to anyone while equipped on a Wonderland server. This is likely caused by a bug with a plugin on the servers, i.e. the "Wearables" Plugin, however I cannot find any information about this plugin anywhere on Source Mod. This is more of a technical issue, and there is no guaranteed fix for a problem like this, nor is this issue very impactful on the overall experience on these servers. I can post more information if necessary, but I don't expect this thread to go very far toward finding a solution. Anyways, thanks for your time.