On the mod page and in multiple videos I see the zombified player is supposed to replicate your skin and make it look zombified, but when I die it just makes a zombified Steve instead.
I tested it with no mods and it worked perfectly, so I suppose I'll have to narrow out which mod is causing it before it can be fixed, or I can just send you my mod list if you'd like. Thanks

Send modlist and latest.log (inside your minecraft installation folder, under logs)