how to prevent iCloud password from merging two entries from a same domain?

I have access to two services on subdomains of the same domain servicea.example.com and serviceb.example.com.

For both services I have the same user but the authentication token is different. The iCloud password insists in merging both entires into one, so I cannot keep both entries with different authentication tokens

Is there a way to prevent the password manager from merging entries from two subdomains?