Gnome terminal can't display Big5 encoding

[Richard Forst <sterbl ta tutanota com>]

I have Debian 11 installed on my laptop; then later on switching from bookworm to testing (by modifying 
source.list in /etc/apt dir). Originally everything works without a problem. I can launch gnome-terminal 
using command

    gnome-terminal --profile remote-big5-server 

In launched gnome-terminal typing 

    ssh <user>@<domain.com> 

After connecting to the remote server, big5 is displayed correctly, and I can search with IME for big5 
characters. 

I suppose it's because upgrading to testing - I did upgrade like 

    apt-get update && apt-get upgrade

After upgrading (I can't really sure if this is the root cause), now when I try 

    gnome-terminal --profile remote-big-server

and connecting with 

    ssh <user>@<domain.com>

The response from the remote server now becomes rubbish characters. However I do not observe any errors such 
as gtk errors or something (there is no single error printing on the console, that's why I am scratching my 
head). 

Gnome version is 3.40.3 for GNOME 40

Any place to debug or how to fix this error? Though I can still can use luit -encoding big5 ssh 
<user>@<domain.com> But it's a bit annoying that I can't use gnome terminal directly. 

Please let me know if more information is needed.

Thanks