There are some issues with the floating window.
Issue No. 1: The floating windows (such as sprite Editor) can’t be re-sized or maximized.
Issue No. 2: The numbers in here can’t be changed by typing. They can be changed only by click holding and sliding using mouse.
Issue No. 3: A panel of the Sprite Editor is even visible and on top of other applications even when I have switched to another program.
Confirmed, fixed for next build.