Custom Notification

I have configured flexicontent to send notifications to admins on new content. That's fine so far, but there is a setting to add a custom message to the notification. Unfortunately, it gets attached to the existing message, and this already quite long text appears in the subject of the email instead of the body.

Is there any way to change that? Or is there a good reason for having such a lot of text in the subject instead of the email body?
Thanks for any hint.

hello you can override via joomla language string !
but not for each notification, it will be added in j4 version because we will use workflow system

Thank you for the quick reply. I was thinking of that, yes. But my issue is, that the text is in the SUBJECT, which makes the subject relly long, I would have expected the text - especially the custom text, which is not limited in length, to be in the E-mail BODY... Is there a reason for this that I haven't seen?