I also noticed something else in relation to the above, (in Alpha1)-
If you press A or Pick up/All in menu, you may find the controllers are off screen which means you should use the zoom function to get the whole floating selection (bounding box + controllers) into screen view for editing. The bounding box remains, but the controllers for rotate scale etc disappear. Logically, when re-selecting the pencil or hand tool after finished zooming, you expect to continue adjust the image, but in doing so the whole floating selection disappears. It’s as if it clears the screen and you have to press ctl/z to get it back and woring.