Positioning bug when editing Drag & Drop with Chrome
When editing a Drag & Drop activity with Chrome, it's not possible to change the x & y coordinates of the dropzones in pixels, only in steps of 10. If you try smaller steps (1 to 9 px), it seems to stick OK but if you need to change the x or y, the next time you click on the dropzone it "jumps around" to stick to 10px values.
This problem does not occur in the Microsoft Edge or FireFox browsers.