The vertex color channels do not seem to export properly into Maya even though re importing it back into Blender seems to work fine.
Tested it in Maya 2017 and 2019 with Blender 2.8 daily builds, 2.79 stable and daily builds.
Could someone with access to Maya test this as well?
I mentioned it here as well: https://developer.blender.org/T53745
Thanks!