How to notify the Debian team about an issue whose resolution looks unfinished? About dead keys bug, typing: ` + A gives `A and not À like before

A month ago, a regression happened in Debian 12 [that caused dead keys not to work for a while](https://unix.stackexchange.com/questions/776059/cant-type-%c3%aa-e-on-my-french-keyboard-anymore-dead-keys-and-ctrl-shift-u-a) . It was a [bug](https://www.mail-archive.com/debian-bugs-dist@lists.debian.org/msg1970288.html) and they corrected it. Things came back mostly to normal now, except for ` + A that doesn't type __À__ anymore. Today, it produces:

`A

(if you have a VM with a previous Debian 12 version before May, or a Debian 11, you can check that it was working once: you got the À) I would like to warn the Debian team that the resolution of the bug #1070745 isn't finished. Because I'm not sure they are aware of this. But I don't know the steps to follow to add such an entry to this issue. Just send an e-mail? To which destination, with what title and what formalism? Can you give me clues to do my report correctly?