Markdown tables do not consider minimal table heading/body separators

[chrispy-snps]

If I publish the following Markdown source file to HTML5:

# Table Test

| Foo | Bar |
| - | - |
| 1 | 1 |

| Foo | Bar |
| -- | -- |
| 2 | 2 |

| Foo | Bar |
| --- | --- |
| 3 | 3 |

Only the third table is recognized as a Markdown table; the first and second are published as paragraph elements:

<p class="p">| Foo | Bar |
| - | - |
| 1 | 1 |</p>

<p class="p">| Foo | Bar |
| -- | -- |
| 2 | 2 |</p>

Only tables with at least three hyphen characters in the heading/body separator (| --- |) are considered. However, the MultiMarkdown table syntax topic does not mention this requirement:

https://fletcher.github.io/MultiMarkdown-5/tables.html

and other Markdown processors I tried recognize all three tables.