Preview Images Show Color Banding

This has been bugging me for over a year. For my OTA channels, the "preview" images constantly show evidence of being corrupted, with color banding across the images, as if the color channels in the image were misaligned or missing some data. Here is an example picture of the effect. It seems to happen with the data being pulled for my OTA channels only.

Any ideas as to the cause or a potential fix?