WP 5.0.3 Support

Seems like you have a great plugin here. I need something just like this for a project I am helping someone setup, but when I use it on a WordPress 5.0.3 installation, it doesn’t seem to completely work. It seems to just add a newly created user to one of the sites. Now I have only 2 in my case; a main site and a single subdomain site. When I created a new user on the network with this plugin network activated, the new user was added only to the subdomain site.

Is there something I should do to get it working or is this a “supported version” issue? If it is the version, any chance you will be releasing an update soon to add support for 5.0.3?

Thank you so much for your dedication and work on this plugin. It is greatly appreciated.