Facing promble when use box as prompt

Thanks for your excellent work!

I'm using sam2 to generate a mask based on my box. However, the results are not good for some masks, especially if they are occluded by other objects, such as the result below


Here is the original image.

I want to get the 'bed' mask, but what I get is only a part of it.

Is there any way to improve the test result of the mask? Thank you for your help!