Steps to Reproduce

-Create one folder. Publish it.
-Edit the folder. Save it and exit the edit mode (don't publish it)
-Go to "Versions" tab

Here we can see that the "Draft under edit" group is not shown when it should.

Additional info:
-Edit the folder again and publish it (creating a new published version of the object, same as an Archived one)
-Go to "Versions" tab again
-Now we can see that the "Draft under edit" exists and that the draft we previously saved is shown.
-After that, even if we remove the archived version (thus, staying only with one published version as we had when we first created the draft), the "Draft under edit" still can be seen.