window title in mate terminal not change after I logout from ssh

My test results with MATE Terminal and two different SSH servers are below:

* When I connect to 1st SSH server (openssh 7.6p1-4ubuntu0.3, Ubuntu 18.04 LTS amd64) from any Ubuntu MATE version (from 12.04 LTS to 21.04) I see even worse situation - window title does not change on SSH-login and after SSH-logout.
* When I connect to 2nd SSH server (openssh 6.7p1-5+deb8u8, Debian 8 armhf) from any Ubuntu MATE version (from 12.04 LTS to 21.04) I see that window title is changes correctly.

So I suppose that there is some incompatibility between SSH client and SSH server which incorrectly report window title (actually prompt or $PS1) change.

Please provide some info about your SSH server (its name, version, OS).

At first post, I connect to Centos 7 with version 7.4p1.

Now, I try to test like you do.

1st, I logged into Debian 10.10 server via ssh with version 1:7.9p1-10+deb10u2. After that I log out, and my Window terminal isn't change.

2nd, I login into Centos 7 server use same terminal with 1st login, the window title change to new title via ssh with version 7.4p1. After I log out, the window title still use 2nd <user>@<hostname> (Centos7).

configuration about $PS1 is so impactly with my problem?

So it really depends on OpenSSH server version.

I'm not sure how to correctly debug this issue, so I have added openssh package to this bug-report to get some comments from them.

Thank you for the bug report.

It seems to me that this is a MATE-specific configuration, and not something related to openssh. When you ssh into a host, ssh takes control of the terminal and the PS1 variable becomes something else, which is reflected on the window title. When you log out of the ssh connection, PS1 doesn't get overwritten again because the control is now back to your shell.

Maybe there are ways to force the window title to be "refreshed" when you disconnect, but I don't know offhand, sorry.

I'm setting the bug as Invalid for openssh.