I'm attempting to submit the upcoming MXR Dookie Drive to the pedalgrid database, but when I upload the image of the pedal, the white part of the artwork on the front is removed. How can I stop this from happening?

https://www.modulargrid.net/p/mxr-dd25-dookie-drive


The removal of white background is only applied to JPG.
Uploading a PNG circumvents the image processing.