Paragraph starting with 4 spaces or more in a list item is read as an indented code block in CommonMark Markdown 1.2

When rendering to markdown/1.2 a list item containing a paragraph whose text starts with spaces, the spaces are kept after the list item indentation, and the paragraph is read back as an indented code block when there are 4 spaces or more.

Expected: the paragraph is read back as a paragraph.