Additionally, in the first screenshot you can see that there’s a code block at the top showing the too-small tab width. The “four tabs” line at the bottom is not a code block, and it has the same problem. It doesn’t seem to be directly related to code blocks.
Here’s another screenshot with a code block that also shows another problem: the indentation markers of the different “five tabs” lines are misaligned with each other. The one under the list looks like it starts centred with the first bullet point, the one outside of the list looks like it starts right at the left margin.
