Can't forward image from a thread

[HarHarLinks]

Steps to reproduce

1. go to https://matrix.to/#/!AZozoWghOYSIAfaZjJ:matrix.org/$jf9BUsdwpskZIMklDOMzqE6P1CdzXfZWoig3-nuht38?via=matrix.org&via=privacytools.io&via=tchncs.de
2. the source is structured like this, not sure if that's a proper thread event or not, so pasting here:

{
  "content": {
    "body": "image.png",
    "info": {
      "h": 707,
      "mimetype": "image/png",
      "size": 518253,
      "thumbnail_info": {
        "h": 600,
        "mimetype": "image/png",
        "size": 458227,
        "w": 466
      },
      "thumbnail_url": "mxc://xxx",
      "w": 550,
      "xyz.amorgan.blurhash": "T4RfIGO@=s#m*J00EfB:%2QmH?w^"
    },
    "m.relates_to": {
      "event_id": "$yyy",
      "m.in_reply_to": {
        "event_id": "$zzz"
      },
      "rel_type": "io.element.thread"
    },
    "msgtype": "m.image",
    "url": "mxc://XXX"
  },
  "origin_server_ts": 1644415812501,
  "sender": "@aaa",
  "type": "m.room.message",
  "unsigned": {},
  "event_id": "$bbb",
  "room_id": "!AZozoWghOYSIAfaZjJ:matrix.org"
}

3. click to forward the image

Outcome

What did you expect?

forward the simple image

What happened instead?

1. it's preview is formatted like a reply (not even like a thread), when it should forward a simple message
2. it fails to send
   

Operating system

arch

Application version

Element Nightly version: 2022020901 Olm version: 3.2.8

How did you install the app?

aur

Homeserver

1.51

Will you send logs?

No

[HarHarLinks]

Closely related, forwarding an image that is a reply on stable 1.10.1 will include the reference (m.relates_to dict) from that reply, which just doesn't work:

Unable to load event that was replied to, it either does not exist or you do not have permission to view it.

The preview shows that it will try to include the reference of the reply to, but not that it will fail, nor does it give the option to strip it or convert it to a reply fallback(?) which of course is nonsensical with replied images.

Of course this whole issue is intertwined with the deprecation/revamp of reply fallbacks in spec.

I propose to add above mentioned 3 choices to the forwarding dialogue (only shown when the context permits = there is m.relates_to data).

[daniellekirkwood]

I can't replicate the "reply" with forwarding but I do encounter an error when trying to forward a message in a thread to another room.

I think this falls into the fast follow epic along with things like "voice messages" so I'll remove the Needs-Product label and update the issue to reflect that.

If you have any other questions, tag me :)