Incorrect formating of lists containing code blocks in markdown

Prettier 2.7.1
Playground link

--parser markdown

Input:

1. My first list item
   ```ts
   import { /* ... */ } from 'my-package';
   ```

1. My second list item
   ```ts
   import { /* ... */ } from 'my-package';
   ```

1. My third list item
   ```ts
   import { /* ... */ } from 'my-package';
   ```

Output:

1. My first list item

   ```ts
   import /* ... */ "my-package";
   ```

1. My second list item

   ```ts
   import /* ... */ "my-package";
   ```

1. My third list item
   ```ts
   import /* ... */ "my-package";
   ```

Expected behavior:
The expected output should have been:

1. My first list item
   ```ts
   import { /* ... */ } from 'my-package';
   ```

1. My second list item
   ```ts
   import { /* ... */ } from 'my-package';
   ```

1. My third list item
   ```ts
   import { /* ... */ } from 'my-package';
   ```

1. The curly braces should have been kept.
2. The from keyword should have been kept.
3. There should have been consistent line-return after the list item. In the current output only the last element has one line return, all others have 2 line returns before the code block.

Start by reproducing the linked Playground example with the --parser markdown option and compare the formatter output with the stated expected output. The work is done when list items containing fenced TypeScript blocks retain their syntax and use consistent spacing before each code block.