I've been killing legashi rogues for days... Enough to have 90 felcloth farmed. This recipe refuses to drop. I've talked to others with similar horrible luck. Is this bugged? Every website reports it as a 4% drop rate

https://tbc-twinhead.twinstar.cz/?item=13491
http://database.wargate-project.org/?item=13491
http://db.excalibur.ws/?item=13491