Request sent for every line in cbq's batch mode

When entering lines to be accumulated in a batch in cbq's batch mode, I see a request SELECT RAW 1; being sent to the server for each line.

cbq> use Default;

-> SELECT RAW 1;

cbq> select * from users;

-> SELECT RAW 1;

cbq> \;

-> SELECT RAW 1;
-> use Default; select * from users;