I'll check it again when I get a chance to play again later tonight. Could've been a fluke. If it's still happening, I'll try to get another one from upgrading rares, and see if the same thing occurs on reforge. Might just be a problem with the specific one I had in my stash...I hope so.
It was near the end of my play session last night, so I didn't extensively keep testing. However, I figure maybe somebody who has time to play during the day today can look into this.
I have a non-seasonal Demon Hunter (always been non-seasonal, it's my first char). In my stash I had Hellcat Waistguard that I wanted to reforge in the cube. But every time I reforged, the resulting item had random stats instead of DH/Dex like it should've. I tried I think 6 or 7 times.
If nobody replies before later on tonight, I'll try it again and see if I can confirm it's bugged.