I've noticed in issue in recent versions of Spine (currently on 3.5.20) where updating an image won't be reflected in Spine. Instead, two instances of the old version of the image show up in the Images directory in the Hierarchy. I don't have to fully shut down Spine, but I do have to reload the project in order to fix it. The image then updates, and there's a single instance as there should be. Is this a known issue?