I had an issue where my domain without www was not going to my www.domain.com.
I changed the setting of the www prefix to be without and now the store points to another store in my multi store set up. I have three stores with three different domains and two out of three are working fine.
experiencedancett.com goes to Experience Dance
sweatfitnessgear.com goes to Experience Dance (previously to nowhere and www.sweatfitnessgear went to SWEAT FItness gear but now it also goes to Experience Dance
bezaleelgarments.com goes to Bezaleel Garments
I am using version 4.3