Dreadflame illusion missing?

Hi,

I got the dreadflame enchant during season 1 of BFA but as of yesterday the enchant suddenly disappeared off my weapon and from my transmog collection in the xmog window.

Is this a bug ???

On that account?
Your highest achievement is Rival. Dreadflame is awarded at Duelist.
If you had it previously, it was because of a bug.
Alternatively, your achievements got rolled back because it was determined that you cheated or were piloted by another player.