Log Shipping - Disconnecting Users

I would like to understand if it's normal that while the log file is being restored, I have users disconnected from ALL databases on the instance and not just the DB being restored. I was under the impression that it's just the DB being restored... I'm asking becuase I have a CHECKDB process running on 'another' database and it's stopping as soon as the restore kicks off on the OTHER database. > Msg 233, Level 20, State 0, Line 0 > > A transport-level error has occurred when receiving results from the server. (provider: Shared Memory Provider, error: 0 - No process is on the other end of the pipe.)