Logout of random user logs out every other user on the same IP


consider the following scenario:

Requests from User #1 and User #2 get routed with the same IP.

User #1 logs into the site on Computer A.
User#2 logs into the site onComputer B.

Now, if User #1 logs out, User#2 gets logged out too.

This happens since we activated "Cross Domain Auto Login" on the Domain Mapper Plugin.

What can I do?