Client Crashes on character converted from Neltharion to Icecrown

Hello,

I tried opening an in-game ticket but it doesn't seem like it's gonna get answered any time soon and I can't create a ticket for anything other than bans on the support section of the site either so here I am.

I converted a character from Neltharion to Icecrown and when I try to log into that character, the client crashes. At first I thought it was because of the WOD models but it turns out I can log into any other new character without an issue.

Is this a known issue or could a GM take a look?

Thanks :)