X11 windows can be shared between processes (actually they all exist on the server 'Xorg') so that interaction between Aseprite and Nautilus isn't entirely surprising.
It sounds like Aseprite's fault, but since Nautilus was the app identified as owning the window at the time we can leave it assigned to Nautilus. ** Changed in: nautilus (Ubuntu) Status: Incomplete => New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2078901 Title: Persistent Thumbnail Artifact Appears on Desktop When Opening Images To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nautilus/+bug/2078901/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs