BUILD ITEM POOF WHEN TRYING ON ANOTHER BOOT

I GOT A LEGENDARY WINDSCREAM I WANTED TO SEE WHAT THEY LOOKED LIKE AND I TRIED THEM ON WITH A FULL INV. WELL MY CORPSEWADE WITH 12% AND 24% FIRE RESIST I NEEDED DISAPPEARED HELP!! IM LITERALLY GONNA HAVE TO GO BROKE TO JUST GET A PAIR CLOSE!!!