When you're preparing a print file for Amazon that contains images with Bleed, it's important to adhere to Amazon's specific requirements for these images. Amazon requires that any image that extends beyond the page’s margins to reach all the way to the edge of the page, leaving no visible white margins. If there's a white border around the image, Amazon might reject the file.
You can learn more about Amazon’s bleed requirements here: https://kdp.amazon.com/en_US/help/topic/GVBQ3CMEQW3W2VL6