If backspace is pressed in the first line of an unordered list, the whole list will be removed and become simple paragraphs.

Steps to Reproduce

• Create the following list

  something
  - item 01
  - item 02
  - item 03
  something
  

• Hit backspace and delete any character from "Item 01"

The list disapears

Note: This does not seems to happen in eZ Publish 5.x