FWIW, converting to 32-bit mode to get around this issue is a bad idea, as you then lose the bicubic options. If you're really concerned about this issue, a better approach would be to convert to LAB mode and do the resize there. The 'L' channel is perceptually uniform and this bug doesn't occur when resizing in LAB mode.

But honestly I think this is highly unlikely to be an issue with real-world images. The samples in that article are contrived.