changing a list creates strange bullets and indentation

When you create a indented list, save it, and then try to change it, the editor gets confused. It adds a new bullet on the next line, without inserting a new line (i.e. the next line then has two bullets); this line cannot be edited then.

See the attachment image for the result.

How to reproduce:

• create a new document
• insert an unordered list with two list items
• make the second list item indented
• save the page (do not try the rest without saving)
• edit the page again
• go to the end of the line of the first list and press enter.

See the attached image for the result.
Also, you cannot edit the resulting line.
However, if you click save, this strange result is not really save, the result just stays the same.