I have created a mosaic dataset that has overlapping 4-band aerial imagery with different resolutions. If have set that mosaic dataset to use the "Min" Default Mosaic Operator. Based on the documentation, this should display the non-white pixels, given the white pixels are 255,255,255,255. I have also tested with setting a "no data" value for pixels that are value 255 for all 4 bands. I've found, as I zoom in, the min operator appears to work as expected, so what may be causing it not to work at the higher zoom scales?
I've included a few attachments to demonstrate this issue.