What
In a remote session, the machine doing the work regularly updates the server about its state. That update can now carry a connection status. Before, it carried only a work period number and, optionally, a worker status.
Why
The server can now be told whether a remote session is connected.
Something disagreesSomething we can check disagrees with this entry, or the writer said they could not settle it.
The writer flagged doubt
It is not clear whether the server does anything with the connection status yet.