Disconnected & Healthy Passive DB during Database Failover to DR

Hi,

We are implementing DR site. We have one Active and One passive Copy in Primary site and additional passive copy in DR site.

While, I am trying to mount the Database to DR Site server. Its mounting perfectly.But, primary site DB copy status has changed to Disconnected and Healthy.

Please let me know why it showing like that...

I tried to mount back to primary site server. But its not mounting and its giving error.

Regards

M