Hi,
I made a few progress on this problem.
I found a workaround for Emacs by starting it with 'XMODIFIERS=@im=none emacs'.
But, I am still stuck concerning Discord and VSCode (both are built using a
NodeJS framework, this might be related). And, surprisingly, I have some of my
systems on which it is working fine and some others where the bug appear and I
have no explanation for that... All my systems are running a Debian unstable and
are updated regularly.
So, I am trying to identify what are the differences between all theses systems.
As I have no idea where to look, it might take some time but I am still trying. :-)
Regards
--
Emmanuel Fleury