I think the game is accidentally using some test sword from Final Fantasy or something lmao

Reported this in the last patch. They acknowledged. They seem to have changed the on hit effect. 

 

But the description says it's "pure fire." There should be no metal at all let alone the FF sword lol.  Or at least something like the tooltip/description. 

I think whoever is checking the bugs could be mis-reporting some of them because I reported an issue with Two Handed Style, that +1.1 damage was being used instead of x1.1

 

The person who reported the bug may have wrote "description needs updating" internally and so they updated the description (the text) but didn't fix the actual bug.

 

Could be the case here too.