issues on changing domain

Hi,
we've switched from WPMU domain mapping to your component.
On staging environment, it was ok for Network Admin (www.domain1.com) , subsite admin and subsite frontend url (test.domain1.com)

We moved to production : www.domain1.com remains for network admin, and subsite becomes www.domain2.com

**=> On backend**

- it's ok for network admin
- it's not ok for subsite admin with url www.domain2.com/wp-admin/ : either we can't log in or it ends on redirect loop (SSO mercator)
- to access the subsite admin, we still need to use test.domain1.com/wp-admin/ . So we can't have the navbar to quickly switch to backend when we navigate on frontend.

**=> On frontend**

- it's ok for www.domain2.com if we are not logged in on backend
- If we are logged in on backend, we got a 403 error if we want to display a page...

we checked wp_blogs table, wp_site table, wp_domain_mapping table, wp_options table (for network) and wp_X_options table (for subsite) and all is ok.
We can't figure out where and how old test.domain.com is mandatory

Of course, we cleared our cookies and try different browers