Replace image

Replacement occurs not only based on the name "img1" but also on the hash of the image itself, so all identical images are replaced. Is this a feature of the docx format, or is it a bug?

<img width="2075" height="881" alt="Image" src="https://github.com/user-attachments/assets/da30e7a1-412a-4ac3-9e3f-b9135e776277" />