Myrmidia said:

I wanted to upgrade a class II small arms (lvl 4)  for the weektly quest, so i swithed it to the slot of my legendary class IV small arms.

The class II small arms is on my hero and where my class IV should be in my invventory i have a class II helmet instead.

I've had this before with the same legendary item (see my post on the 28th of april) and it got fixed then. 
Please fix it again and get rid of this bug.

I'm playing through Facebook and on Badlands server.

Thanks in advance for looking into this.

Hello Myrmidia,

Sorry for a delay in response. Please send us a screenshot of this bug. Also, we'd need your in-game coordinates in order to investigate the issue further.