…Creat a mog.
Each time I want to preview an item, ctrl-right click, the appearance tab close and only the dressing room remain.
Rinse and repeat for each item.
Before the patch, the dressing room would open on the right, and the appearance tab on the left. All addon are disable. Something else is broken…Again
Try closing the Appearance List tab (the scroll icon in the dressing room) and/or shrinking the dressing room with the button with the 
in it.
You can also try shrinking your UI scale in the Graphics section of the System menu. I get the same issue whenever I preview something in the Auction House when my UI Scale is set to 1.0. It’s annoying!
Now I feel stupid not trying to click the scroll…
Thanks for the intellect buff Zephyy!