As it says on the tin. This bug has been around for at least several months (probably longer), been reported repeatedly, and applies to the following weapons: Gunsen All Nikanas - including Umbra Excalibur's Skiajati (will show through the scabbard) Venka Prime Sigma and Octantis (only shows in mission and will temporarily disappear at random) Glaive Prime Orvius   There are possibly a few other weapons, but these are ones that