@username inserts an example.com mail address into the post

[rich20]

Describe the bug
https://www.kunena.org/forum/36-German/168490-nach-zeichen-im-beitrag-auswahl-von-threadbeteiligte-erstellt-mailadresse#231611
Confirmed

To Reproduce

1. Reply in a topic
2. Enter an @ followed by a letter
3. Select a name from the list (see image)
4. Submit the message

Actual result
It adds an example.com e-mail address

System information

• Joomla version: ‎5.1.2-dev
• Joomla template: CASSIOPEIA
• Kunena version: 6.3.2
• Kunena template: Aurelia
• Php version: 8.2.18
• Database version: 10.5.23-MariaDB

Desktop

• OS: Ubuntu 22.04.1 LTS
• Browser: Chromium, Firefox and Opera

[Gindi50]

I have installed fix 8ea4035 in my Kunena 6.3.3-DEV installation and now when I enter @(letter) in a reply post and click on a displayed name, it does not display @herbert but [mention userid=43]herbert[/mention].
gindi

[Gindi50]

In my installation, I changed the entry '[mention userid={userid}]{username}[/mention]' in edit.js to '<a href=">@{username}: ' and added a ":" and a space after the user name.
Now @herbert: is displayed for me.
gindi