Originally Posted by Zeddy_god
Yep most servers have disabled these skins. If it is infact a model update and not gamedata, it's going to cause some serious issues for servers such as ours with tons of custom models.
Disable the custom models for now as a temporary fix.
as for now, this is the only plausible fix for models, especially on community servers like Zombie Escape. We hope that valve can find some sort of fix and/or someone finds a solution to this as most of the zombie escape use custom models to make the gamemode possible.