wordpress multisite, multi-domains, one site main page always redirects to another site main page

I have two sites on multisite WP installation with multi-domains plugin: main site (id 1) budikom.net and one additional site (id 3) ignisoffice.com.
If I open ignisoffice.com/test it will open correctly or if I open ignisoffice.com/wp-admin it will open correctly.
But if I open ignisofffice.com then instead of openning ignisoffice.com it redirects to budikom.net (budikom.net itself opens correctly).