[help!] checkered pattern using box/point prompt

Please help me! I want to segment out that small parcel of land shown in the picture. Below are screenshots using point prompts and box prompts. Why does this blocky noise appear? How can it be resolved?
I use this [tool](https://github.com/heyoeyo/muggled_sam?tab=readme-ov-file#run-image) just for visualization.

point prompt:

box propmt:

The report identifies the external muggled_sam README's Run Image entry point and provides screenshots for point and box prompts. Start by reproducing both cases with that visualization tool, then determine whether the checkerboard artifact comes from SAM inference or visualization. Done means the source of the artifact is identified and a repository-relevant fix or explanation is documented.

Written by the indexing model from the issue text.