[Rendering][iOS] Background Image doesn't fill the card.

[shabripabba]

Target Platform

Please list the platform(s) that your application is targeting and remove platforms you are not targeting:

• iOS

Target Application

Please provide the name of the application that is rendering the card (ex: Outlook, Teams, etc)

Problem Description

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A stretch image inside a card with a background image, doesn't render similar to the designer

Screenshot

Please provide a screenshot of the problem (if possible)
The first screenshot is of Designer and the second one is the test app.

Card JSON

{
  "body": [
    {
      "columns": [
        {
          "width": "1",
          "items": [
            {
              "size": "stretch",
              "altText": "Spider cover showing a spider web",
              "type": "Image",
              "url": "https://i.ibb.co/Z1Bqsxg/spider.png",
              "height": "auto"
            }
          ],
          "type": "Column"
        },
        {
          "width": "1",
          "items": [
            {
              "text": "Click here to play another game of Spider in Microsoft Solitaire Collection!",
              "wrap": true,
              "color": "light",
              "weight": "bolder",
              "type": "TextBlock",
              "horizontalAlignment": "center"
            }
          ],
          "type": "Column"
        }
      ],
      "type": "ColumnSet"
    }
  ],
  "$schema": "http:\/\/adaptivecards.io\/schemas\/adaptive-card.json",
  "type": "AdaptiveCard",
  "backgroundImage": "https://i.ibb.co/KbW7hHq/background.png",
  "version": "0.5"
}

Please provide the JSON of the Card that is being rendered

Sample Code

Please provide any relevant code samples to help reproduce the issue

Version of SDK

What version are you using? Ex: NuGet 1.0.2, or latest main, etc...
2.8.0-beata1