I know this is the wrong place to post this but I can’t post there.
If you place a + item in the market, it will go back to its non-plus version after a little while. An example is if you have a +5 falchion for example and you place it in the market. About an hour or so, it will be listed as a normal falchion instead of +5 falchion. From what I experience this is just a text/graphic bug because if you cancel your listing, you will still get your +5 falchion.
It is however a market-breaking bug because people would assume you’re just overpricing your item.