HTML List Not Displaying Properly

Hello, thank you for your reply!

The issue occurs in posts where both HTML and Markdown are mixed. (I usually ask contributors to write posts using Markdown only, but I’m not sure how HTML got mixed in some cases.)

It seems to work when a “ul” tag appears at the beginning of a line. However, if a “ul” comes right after some text without a blank line, the content after that may not render correctly.
The same content was probably rendered correctly with the previous plugin.

Below is the debug information from a test site I set up. The same issue occurred in this environment as well. The Markdown example you provided displays correctly. The theme in use is Twenty Twenty-Five.

{
    "settings": [
        {
            "name": "MMD_USE_LIGHTBOX",
            "val": "0"
        },
        {
            "name": "MMD_USE_IMAGESLOADED",
            "val": "0"
        },
        {
            "name": "MMD_USE_MASONRY",
            "val": "0"
        },
        {
            "name": "MMD_USE_BLOCKSTYLES",
            "val": "0"
        },
        {
            "name": "MMD_USE_HEADINGS",
            "val": "\"1\", \"2\", \"3\", \"4\", \"5\", \"6\""
        },
        {
            "name": "MMD_KEEP_SPACES",
            "val": "0"
        },
        {
            "name": "MMD_AUTOPLUGS",
            "val": "\"DisableEmojis\", \"FrontendAdmin\""
        }
    ],
    "plugins": [
        {
            "name": "Markup Markdown",
            "url": "",
            "ver": "3.18.2",
            "desc": "Replaces the Gutenberg Block Editor in favor of pure markdown based markups"
        }
    ]
}