Delete / Backspace at the end / beginning of a list item inside another list item when there is text after / before the list causes error / moves content to the wrong place

In wiki editor, insert the following:

* foo((( before
* bar

after)))

now edit in wysiwyg and try to backspace at the beginning of bar or delete at the end of bar.
Backspace would result in

* foo(((before

after)))bar

while delete will cause a javascript exception and a blank document.