I don't think it's a problem in ssh.net.
Can you reproduce this behaviour with plink (http://the.earth.li/~sgtatham/putty/latest/x86/plink.exe).
Can you reproduce this behaviour with plink (http://the.earth.li/~sgtatham/putty/latest/x86/plink.exe).
Usage: plink [options] [user@]host [command]