Entry fails with emoji

(next try as this forum seems to have same issue as the plugin).

If an entry contains an emoji character (e.g. 👍💞 😀), the message is not saved in the database and fails silently. For the user it seems like it worked, as there is no error message.

As an admin, I even receive and email containing all the information of the message, but the link to manage the entry is invalid, as it links to the entry with the id 0, e.g. http://<my-domain>/wp/wp-admin/admin.php?page=gwolle-gb/editor.php&entry_id=0

https://wordpress.org/plugins/gwolle-gb/