Created attachment 178724 [details] Fade out animation only plays under one of the selected files. 1- Open File Picker. 2- Select multiple files at the same time using only the cursor, but don't release the click. 3- Deselect the selected multiple files at the same time using only the cursor. Result: Only one file has its highlight smoothly fading away, while the others lack such fade out effect.
Rubberband selection is an expansion of the cursor's click, so it doesn't make sense that only the file under the actual cursor has the fading effect.
I can reproduce.