I happened to catch a bug that there is an object in the favorite list, but it cannot be removed like other objects. Its position can be moved to other places, e.g., move it to the place of the above Page, so looks like it is a dangling object and I didn’t see this blank link in the side bar (Favorite category). I don’t know how to reproduce this bug. Any suggestions on how to debug this issue? See attached image for that blank object.