Not sure when it stopped, but remote login seems to not work anymore. I'm on the latest version of WP and BP and when I navigate to a subsite that is domain mapped, I'm not logged into it. In fact, even when I'm logged into the dashboard in a separate tab, I'm still not logged in on the front side of the site.
This used to work, but I'm not sure when it stopped working, I only noticed it recently. Can this be verified and checked by someone else too? I went with this plugin (versus the competing plugin) because you guys got this feature working a long time ago. I'd like to get that functionality back, somehow, it looks like the cookie for the main domain and the mapped domain just isn't working together.