Same problem here

same here

if zoomed in, the bug changes to "full size, but easier to see through than a wet white shirt"

update:
after taking a look into it, i see 3 possible reasons for the issue.

but first things first, you find the textures in :\\steam\steamapps\workshop\content\294100\1180573408\Textures\Things\Building\Furniture\BoneThroneErok

the 3 things i see there:
a) different background colors
b) black+white instead of the usual NotGreen-/NotRed-/NotBlue- background colors
c) weird naming of the last one

after seeing these things and checking again ingame, i'm pretty sure the game is messing up some mirroring, trying to use 2/4 of each picture

!IMPORTANT NOTE!
if you're changing those files, the mod won't be automatically updated anymore until you unsub & resub, which will then cause your changes to disappear. there is a way to do local modding of mods without causing that, but idk how. i'll try with the original files and if i make a progress i'll tell jec about it, probably right here.