Weird mesh thingy on edited beast form in life mode

Hey, i hope someone can help me here. So i've got this problem, when my sim get's bitten and turned into a werewolf they firsy show up with cc hair that does disappear when I randomise the beast form a few times in CAS everything looks fine but as soon as i go back into life mode there is this weird mesh texture on the sim (only in beast form) and i don't know how to remove it. I've tried to run the game withut the werewolf related cc but it didn't change anything and when I use s4s it tells me that there is no fixing neded. I have a lot of cc and do not want to go through every little bit. Is there a way to fix this issue with s4s or anything else? I got the pack today and really want to play with it but this is really annoying because it just loks so weird and distracting    
I hope there's someone who can tell me what's going on here and how to fix it