Motion Photos debuted alongside the Pixel 2 and Pixel 2 XL as a direct competitor to Apple’s Live Photos. These Motion Photos are saved by default whenever you take a picture, allowing you to catch a glimpse of the background while the photo was being taken. But until a day or two ago, these Motion Photos would remain in your Google Drive library, even if you’d already deleted them through Photos.
Google fixes bug that prevented Motion Photos from being deleted from Drive when you delete them in Photos was written by the awesome team at Android Police.