export_to_markdown with page_no - parameter adds table at the end of the markdown

### Bug
I have generated a ConversionResult with smoldocling-Vlm-Options of a large PDF file. When I use the export_to_markdown method with parameter page_no it adds a table at the end of each generated markdown text. When I remove the parameter and export the whole conversion result at once this table is not added to the markdown.

When I generate the ConversionResult with a smaller page_range, for example (1, 50) the export_to_markdown(page_no=..) works without any issues as well. So this appears just when converting the whole document and using page_no parameter.

### Steps to reproduce
You find the PDF file attached.
[IBM_V7R4_RPG_Programmers Guide.pdf](https://github.com/user-attachments/files/19864534/IBM_V7R4_RPG_Programmers.Guide.pdf)

The following code I am using for generating the ConversionResult. It takes quite long because of its size. Therefore I have saved the result to json with `docling_result.document.save_to_json()`. Unfortunately the file is too big to add it to the issue.
```
file_path = "IBM_V7R4_RPG_Programmers Guide.pdf"

pipeline_options = VlmPipelineOptions(
force_backend_text=False,
vlm_options=smoldocling_vlm_mlx_conversion_options
)
docling_converter = DocumentConverter(format_options={
InputFormat.PDF: PdfFormatOption(
pipeline_cls=VlmPipeline,
pipeline_options=pipeline_options
)
})

# Convert the PDF with Docling
docling_result = docling_converter.convert(file_path)
```

When I execute the following line with the export method..
`print(docling_result.export_to_markdown(page_no=1))`
..I get the following output. There is added this table, which is not part of the document/result.

> IBM i 7.4
>
> ## Programming IBM Rational Development Studio for i ILE RPG Programmer's Guide
>
>
>
> | Line | Number | Source Specifications | Comments | -> Scr Seg Number |
> |--------|----------|-------------------------|------------|---------------------|
> | 33 | 1 | 2 | 26 | 35 |
> | 34 | 1 | 2 | 26 | 35 |
> | 35 | 1 | 2 | 26 | 35 |
> | 36 | 1 | 2 | 26 | 35 |
> | 37 | 1 | 2 | 26 | 35 |
> | 38 | 1 | 2 | 26 | 35 |
> | 39 | 1 | 2 | 26 | 35 |
> | 40 | 1 | 2 | 26 | 35 |
> | 41 | 1 | 2 | 26 | 35 |
> | 42 | 1 | 2 | 26 | 35 |
> | 43 | 1 | 2 | 26 | 35 |
> | 44 | 1 | 2 | 26 | 35 |
> | 45 | 1 | 2 | 26 | 35 |
> | 46 | 1 | 2 | 26 | 35 |
> | 47 | 1 | 2 | 26 | 35 |
> | 48 | 1 | 2 | 26 | 35 |
> | 49 | 1 | 2 | 26 | 35 |
> | 50 | 1 | 2 | 26 | 35 |
> | 51 | 1 | 2 | 26 | 35 |
> | 52 | 1 | 2 | 26 | 35 |
> | 53 | 1 | 2 | 26 | 35 |
> | 54 | 1 | 2 | 26 | 35 |
> | 55 | 1 | 2 | 26 | 35 |
> | 56 | 1 | 2 | 26 | 35 |
> | 57 | 1 | 2 | 26 | 35 |
> | 58 | 1 | 2 | 26 | 35 |

**This table is just added, when using the page_no parameter and when converting the whole document! The page_no parameter is needed, because with page_break_placeholder empty pages are removed.**

### Docling version
Docling version: 2.30.0
Docling Core version: 2.26.4
Docling IBM Models version: 3.4.1
Docling Parse version: 4.0.0
Python: cpython-311 (3.11.9)
Platform: macOS-15.3.2-arm64-arm-64bit

### Python version
Python 3.11.9

Thanks in advance for any help!