I have the DT-11 Blaster pistol and the holster disappears constantly. I run a Gunslinger most of the time and both holsters will disappear often. During combat, activating mount, or using a number of the abilities. They ALWAYS disappear when I enter a cutscene, have not once seen them during one. As stated above, when an animation that hides the weapon or changes the blaster during the ability the holster disappears and doesn't come back. They also disappear when I loot after combat if I have the blasters in my hands as well.
Only way to get them to come back is to hope when you load to a new area, go into the Outfitter and hit the "Show Gear as Outfit" then reenable it, or change to a different outfit.
It's rather frustrating to spend money on these blasters that have holsters only to have them be as glitchy as they are. Besides the holster for the DT-11 disappearing, during cutscenes where it shows the back end of the blaster the moving parts (the slide inside the blaster) disappear consistently in every scene.
Can't believe this is still a bug after so many years. Please fix it!