I also have the above problem. Do I need to re-splice through Aseprite?
if you're using a game engine, look for 9slice
https://docs.unity3d.com/Manual/9SliceSprites.html
Thank you for your reply. I am being silly. I use Unity as my development engine and I didn't realize that the source Image type under Image component can be selected as Slice. My problem has been solved
