Steps: 1) Have files in an open folder layer. 2) Select the layer in the folder. 3) Clicking on the down-arrow on the folder to close it.
Expected result: The folder will close.
Actual result: Selecting the folder layer. ---- If I'm not mistaken, in the new update (Photoshop CC 2017) you now select the folder even if you click on the down arrow directly. Super annoying having to do it in two steps instead of one. Navigation between layers slows down a lot.