Creating a new room that invites a non-existent matrix ID doesn't fail and instead retries (indefinitely?).

Calling Client::create_room (in the FFI) with the following parameters (specifically with an invite for a matrix ID that doesn't exist), seemingly runs forever and instead of failing, keeps creating new (empty) rooms. I left it for a minute or so and have 10 rooms, so not sure if there's a limit. Also unsure if it's important that the domain doesn't exist (that's just how the UI gets triggered on Element X) or just that the user doesn't exist.

CreateRoomParameters = {
  name = nil
  topic = nil
  isEncrypted = true
  isDirect = true
  visibility = private
  preset = trustedPrivateChat
  invite = 1 value {
    [0] = "@someone:unregistereddomain.uk"
  }
  avatar = nil
  powerLevelContentOverride = PowerLevels {
    usersDefault = nil
    eventsDefault = nil
    stateDefault = nil
    ban = nil
    kick = nil
    redact = nil
    invite = nil
    notifications = nil
    users = 0 key/value pairs {}
    events = 2 key/value pairs {
      [0] = (key = "org.matrix.msc3401.call.member", value = 0)
      [1] = (key = "m.call.member", value = 0)
    }
  }
}

Looking at the response from matrix.org which is a 502 mentioning Cloudflare, it's possible this is a backend configuration issue rather than an SDK issue, but it still seems unexpected that it retries so many times.

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            <div class="mt-3">2024-07-29 13:35:06 UTC</div>
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matrix-org / matrix-rust-sdk

Creating a new room that invites a non-existent matrix ID doesn't fail and instead retries (indefinitely?). #3775