For rangers, if using some weapons like axe, your back item will disappear when using any axe skill.
As this game’s main focus for gear is appearance, I consider this a fairly important thing to fix, because if you like to use axes then having a custom back item is pointless, if you can’t see it.
There are other things you can do which vanish the back item, like /dance for example, though less important still a bit silly how doing anything other than standing still or running makes the back item vanish.
Progress blocking bugs are top priority, but not all bugs are so easy to fix as others, be cool :)