I guess that PuTTY could be excused since that is more related to the SSH login sequence. It doesn't really matter which SSH tool you are using, that basic anno

I guess that PuTTY could be excused since that is more related to the SSH login sequence. It doesn't really matter which SSH tool you are using, that basic annoyance will be there. But when you are using the ssh command from a bash prompt, it is less work to cancel and start over than it is to reopen putty. If you are opening a connection that is not saved in your session list, you might consider choosing "Duplicate Session" from the window menu at the top left and avoid retyping the server address in the putty dialog. The annoying thing is that the "Restart Session" command is not available when the connection is still open, so you will need to close the dysfunctional one after launching the duplicate. If it is a saved session, you can store the user name under Connection->Data so that you do not need to type it on each launch.