When creating and deleting sprites in Sprite Editor - it is easy to have same names of sprites

2) How can we reproduce it using the example you attached

See attached video

1 Create new project or use attached
2 Import some image
3 Make it Sprite (set Texture Type to Sprite) in Inspector
4 Set Sprite mode to Multiple
5 Open Sprite Editor
6 Create 2 sprites by hands - notice that names are someName_0 and someName_1
7 Delete first sprite (with name someName_0)
8 Create new sprite - notice that its name is someName_1 too
Actual result: now we have 2 sprites with the same name someName_1
Expected result: the names should be unique