Appservice API does not recieve full unsigned content

[Half-Shot]

Down a sync request I receive:

  "unsigned": {
    "replaces_state": "$1533932569110hPnSg:half-shot.uk",
    "prev_content": {
      "membership": "join",
      "avatar_url": "mxc://half-shot.uk/db7ed219580a58e65d1b84c0bab1d78e",
      "displayname": "cough",
      "uk.half-shot.discord.member": {
        "id": "145545543043645440",
        "roles": [
          {
            "color": 0,
            "position": 0,
            "name": "@everyone"
          }
        ]
      }
    }

and in an appservice transaction I get:

  "unsigned": {
    "age": 500
    "replaces_state": "$1533932569110hPnSg:half-shot.uk",
    },

[turt2live]

in case there's any question about which is right: the appservice should be receiving them in the same format as a client.

See https://matrix.org/docs/spec/application_service/r0.1.0.html#put-matrix-app-v1-transactions-txnid

Parameter	Type	Description
JSON body parameters
events	[Event]	Required. A list of events, formatted as per the Client-Server API.

[richvdh]

so you're missing prev_content. This is as currently specced, though I want to do something about it: matrix-org/matrix-spec-proposals#877.