[GRO] Bunk beds have grey squares

Product: The Sims 4
Platform:PC
Which language are you playing the game in? German
How often does the bug occur? Every time (100%)
What is your current game version number? 1.105.345.1020
What expansions, game packs, and stuff packs do you have installed? All 
Steps: How can we find the bug ourselves? Place the left ladder GreatShapes Great Heights Bunk Bed in build mode.
What happens when the bug occurs? The texture is very patchy and the bed features weird grey squares where on other swatches there are pictures.
What do you expect to see? The same color texture throughout.
Have you installed any customization with the game, e.g. Custom Content or Mods? No
Did this issue appear after a specific patch or change you made to your system? Neutral/Not Sure 

I just tried it again in a new save

The bed is ok if it isn't placed against a wall 

It's also ok, if placed  like this (ladder right) 

As soon as the ladder is on the left the grey squares appear