When opening a weapon screen directly from the vault and switching to the weapon's shader screen, all but the first screen of shaders are empty, and in the first screen there are gaps (i.e. not all shaders are being shown). Other gun properties (e.g. weapon perks) may also not be shown.
PC, Steam version.
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Same problem ps4. Been that way for a long time The game is probably too old to handle stuff like this anymore.