Inpaint feature generates incorrectly positioned and extended images

[wayupi]

Describe the bug
When using the Inpaint feature, the generated image extends beyond the selected area, resulting in unnatural inclusion of areas outside the specified region. Additionally, the position of the drawn content is shifted vertically.

To Reproduce
Steps to reproduce the behavior:

1. Create a new layer.
2. Use a black brush to create a mask on the layer.
3. Select a portion of the image using the rectangular selection tool.
4. Enable the Inpaint option in the Generate tab, configure the settings, and click the "Start Generating" button.

Screenshots
Before generating:

After generating, attention to the position of the arrows:

When superimposed on the mask, you can see that it is clearly out of alignment:

Desktop (please complete the following information):

• OS: Windows
• Comfyui: f9e55d8463da692954d84f51ca354161396fe1b8
• Extension commit revision: c12af95