Is your proposal related to a problem?
There is no way to add an asterisk with a space to the beginning of a paragraph without converting it to a list.

Describe the solution you’d like
In other editors, if you undo the action, it will delete the list, but, leaving the asterisk (allowing you to have the asterisk without creating a list).
In Draftail, if you add the asterisk, then press space, and try to undo the action it erases the list but also the asterisk.
Additional context
This is something that also happen for numbers, you can't add numbers (1.) without converting it to a list