I created two WP multisite sites.
One is on an ip with no other websites and the other one is on a shared ip with another websites.
I noticed that the WordPress Multisite at the shared Ip needs to have addon domains generated for the created network websites. Otherwise those websites don't go to the WordPress mutltisite but to the other website on the shared ip.
In the situation where there is only WordPress multisite the addon domains are not necessary.
I'm curious how that works. Can somebody explain that to me?