Product: The Sims 4
Platform:PC
Which language are you playing the game in? English
How often does the bug occur? Every time (100%)
What is your current game version number? 1.66.139.1020
What expansions, game packs, and stuff packs do you have installed? Everything
Steps: How can we find the bug ourselves? By putting a mirror in left side of a hall, then an arch in right side of the hall. Move camera behind the arch.
What happens when the bug occurs? The mirror reflection shows the arch filled by a wall.
What do you expect to see? The objects & sims behind the arch reflected in the mirror, as it happened before the patch. Images below.
Have you installed any customization with the game, e.g. Custom Content or Mods? Yes
Did this issue appear after a specific patch or change you made to your system? Yes.
Please describe the patch or change you made. After September 3rd patch (multiple windows in a single wall)
First image: before patch (https://imgur.com/a/lZ37Pcy)
Second image: after patch (https://imgur.com/a/HCFsI2V)
No CC. Mirror is Count Vladislaus Paint + Straight-up wall mirror. Arch is base game. Same happens with any other mirror.

