Doing the following works fine:

Blah

• item
• item
• last item

h4 Blah Blah

• item
• item
• item

However, if you do something with the empty line between "last item" and the next h4, then the h4 gets indented.

Examples of what doesnt work:

Blah

• item
• item
• last item
  h4 Blah Blah
• item
• item
• last item
  //

  Blah

• item
• item
• last item
  some random text

  Blah

• item
• item
• last item