Images in Adaptive Cards in New Teams Client not showing

Hello Community,

I've encountered an issue with Teams Webhook Connector where images in Adaptive Cards are not displaying correctly in the New Teams Client, although they work as expected in the classic version.

Our clients have reported that while messages are visible, the images fail to appear. This problem does not occur in the classic Teams client or when viewed in a browser, which I presume is utilizing the classic client as well.

To clarify, I'm using the latest Adaptive Cards version (v1.5) compatible with Teams, and this issue is consistent across both Windows and Apple versions of the New Teams Client. Unfortunately, there seems to be no information available about this compatibility issue in the Adaptive Cards documentation or designer tool.

Below is a simple Adaptive Card JSON that illustrates the problem:

{
    "type": "AdaptiveCard",
    "body": [
        {
            "type": "TextBlock",
            "size": "Medium",
            "weight": "Bolder",
            "text": "This is a headline"
        },
        {
            "type": "Image",
            "url": "https://img.cdn-pictorem.com/uploads/collection/D/DN4DFF8JRC/900_Nature-Art_colorful--paintings.jpg",
            "width": "300px"
        }
    ],
    "$schema": "http://adaptivecards.io/schemas/adaptive-card.json",
    "version": "1.5"
}

For visual reference, here is how the card renders in both clients:

Classic Teams Client:

New Teams Client:

I have not found a workaround yet and would greatly appreciate guidance on how to resolve this issue. Any suggestions or updates regarding the new client's support for Adaptive Cards would be very helpful.

Thank you.

Best regards