Problems with Mask from Automatic Mask Generator with Batch Mode

[Niro4]

Hello!
I'm trying to generate a mask for the following image:

The following is the code I'm using:

model = SamGeoBase(
  model_type="vit_h",
  automatic=True,
  device=None,
  checkpoint_dir=None,
  sam_kwargs=None
)
model.generate(
  input_tif_path,
  output="mask.tif",
  foreground=True,
  unique=True,
  batch=True,
)

The resulting mask looks like this:

This is not a satisfactory mask. I don't know if this behavior is a bug or I'm missing some setting that could fix the mask. Does anyone have recommendations?
If you believe this is a bug, I can create an issue on the tracker.