Markdown table rendered as heading if text follows before it and horizontal rule after it

[Jeecis]

Marked version:
15.06

Describe the bug
Markdown tables are not rendered correctly when there is text immediately preceding the table definition and horizontal rule. Everything is misinterpreted as heading, leading to incorrect formatting.

Found it using Marked npm library in vue js running the following line:
markdown.value = await marked(inputValue);

To Reproduce
Steps to reproduce the behavior:

1. Add some text (e.g., "Some text not supposed to be a heading:")
2. Immediately after the text, define a markdown table using pipes and hyphens.
3. Insert horizontal rule after the table using 3 hyphens
4. Observe that the table is not rendered as expected.

P.S. A quick fix can be done by adding a new line after the first text line, but considering a use case where one may need to parse many markdown files, its very inefficient.

Example:
Input:

## Incorrect behavior:

Some text not supposed to be a heading:
| Column 1      | Column 2      |
| ------------- | ------------- |
| Cell 1, Row 1 | Cell 2, Row 1 |
| Cell 1, Row 2 | Cell 1, Row 2 |
---

Output:

<h2>Incorrect behaviour</h2>
<h2>Some text not supposed to be a heading:
| Column 1      | Column 2      |
| ------------- | ------------- |
| Cell 1, Row 1 | Cell 2, Row 1 |
| Cell 1, Row 2 | Cell 1, Row 2 |</h2>

Demo:

1. Marked Demo
2. CommonMark doesn't support tables so I can't provide demo there

Expected behavior
From following markdown table parsed as table, text as p tag and horizontal rule as hr tag. This can be tested in this website, sorry I couldn't permalink it here - https://www.devloom.net/previewers/MARKDOWNPreviewer
Input:

## Correct behavior:

Some text not supposed to be a heading:
| Column 1      | Column 2      |
| ------------- | ------------- |
| Cell 1, Row 1 | Cell 2, Row 1 |
| Cell 1, Row 2 | Cell 1, Row 2 |
---

Correct output:

<h2>Correct behavior:</h2>
<p>Some text not supposed to be a heading:</p>
<table>
  <thead>
    <tr>
      <th>Column 1</th>
      <th>Column 2</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td>Cell 1, Row 1</td>
      <td>Cell 2, Row 1</td>
    </tr>
    <tr>
      <td>Cell 1, Row 2</td>
      <td>Cell 1, Row 2</td>
    </tr>
  </tbody>
</table>
<hr />

[UziTech]

Looks like this is one of those situations where GitHub doesn't follow it's own GFM spec