Hello again LAFESTA

Unfortunately, not yet.

We're having some issues with the notification editor, and this will be fixed in the future.

Until then, please go to your database, and in table "wp_options", under "option_name" column search for the term "amelia_settings". That will return only one row, so you need to edit it, and in the "option_value" column search for "notifications". Change it to look like this:

"notifications": {
    "breakReplacement": "<div style='height: 0.1rem'><\/div>"
},

And that will correct the behavior.

In wp_amelia_notifications database table, you would be able to edit the notifications, and replace <p> with <br>, but if you do, don't edit the templates anymore through the plugin, or you'll lose these changes.