Redirect when access to a subsite

When I access a subsite (that uses multi domains) via network admin panel, it redirects to the homepage instead of access directly to the /wp-admin.

I am still logged in, because after be redirected to the homepage, if I add the /wp-admin in the browser address bar, I can access to the admin dashboard.

However, this redirect is weird, there is any reason to this happen? Cookies conflict due to MultiDomains plugins?

Can we do something to avoid this?