I’ve done a bit more research, and this white space only occurs with bottom justification, and only with the background parallax setting being used at greater than 100%.
Our standard setting is 110%, and this works fine at all other settings (we adjust the section size with CSS: $el {height: calc(((1280vw/1920)/110)*10000);} Where the first two constants are height and width of the background image in pixels and the third is equal to the parallax setting.) but the bottom justification simply moves the image up for no apparent reason. As we enter larger numbers into the parallax size box the image floats higher and higher, and the white band between images grows thicker and thicker.
This only occurs on desktop systems. There is no gap on mobile.
If there was a way to set the parallax size number via CSS media calls, we could solve our problem quite well by simply setting the number to 100 for desktops, which we would prefer anyhow, and ideally allow the 110 value to remain for mobile.
Thanks!