January 2018 - last edited February 2018
Product: The Sims 4
Which language are you playing the game in? English
How often does the bug occur? Every time (100%)
What expansions, game packs, and stuff packs do you have installed? All
Steps: How can we find the bug ourselves? Draw a room and place one or more half walls within it (number and locations up to you). Add enough lighting to see the room properly. Place white trim on the half walls (note that other colors are subject to the effect as well, but it's easy to see with white). Note the color. Now add a window or a door with a glass portion to the room.
What happens when the bug occurs? The trim changes color - in the case above, from white to blue. The hue varies depending upon the time of day.
What do you expect to see? The trim should remain its proper color when adding windows or glass doors to a room. It might be understandable for the color to shade or brighten a bit corresponding to exterior lighting coming through a window/door and striking the surface, but this is *not* what is happening (you can prove it by drawing a disconnected wall in front of the door or window).
Have you installed any customization with the game, e.g. Custom Content or Mods? Never used.
Did this issue appear after a specific patch or change you made to your system? Yes
Please describe the patch or change you made. New after the 6/2/16 patch.
Here is a screen shot showing a room with half walls prior to adding doors/windows:
And the same room after adding a window:
Remove the window and add a door instead: