Forwarding no longer possible for email and web articles

[MrGeneration]

Infos:

• Used Zammad version: stable / 5.0.2
• Installation method (source, package, ..): any
• Operating system: any
• Database + version: any
• Elasticsearch version: any
• Browser + version: any
• Possible regression of: Email address not shown inside forwarded email #3824
• Ticket: #1095880, #1096003

Expected behavior:

If you have a communication article with email buttons (reply / forward), you can forward the articles content without issues.

Actual behavior:

Web and email articles currently don't allow you to forward the mail in question - no error is shown.
Developer console shows this:

Strange enough: It does work for phone articles. :-)

Customer uses API to create the tickets. It does not matter if the from attribute is provided in article context.
If you add to attribute the issue is gone instantly. This thus only affects articles that have been created via API. from and to fields are not mandatory and thus should usualy™ not break forwarding processes:

{
   "title": "Magic",
   "group": "Sales",
   "priority_id": 2,
   "state_id": 1,
   "owner": "",
   "customer_id": 6,
   "article": {
      "subject": "Magic",
      "type": "web",
      "body": "XYZ,
      "content_type": "text/html"
   }
}

Steps to reproduce the behavior:

• create web and email articles
• try to forward it

Yes I'm sure this is a bug and no feature request or a general question.

[martini]

You can reproduce it with the following article created via rails console:

Ticket::Article.create!(
      ticket_id: 1,
      subject: "Magic",
      type: Ticket::Article::Type.find_by(name: "web"),
      sender: Ticket::Article::Sender.find_by(name: "Customer"),
      body: "XYZ",
      content_type: "text/html",
      created_by_id: 1,
      updated_by_id: 1,
)

Then go to http://localhost:3000/#ticket/zoom/1 and try to forward the last created article.