[Rendering] Newlines for Adaptive Cards don't work in New Teams

Target Platforms

Other

SDK Version

3.0.0

Application Name

Microsoft Teams

Problem Description

When using the new line functionality for adaptive cards in new Teams, the existing spacing between paragraphs is not being inserted as is the case in classic Teams.

New Teams

Classic Teams

Screenshots

No response

Card JSON

{
    "type": "AdaptiveCard",
    "version": "1.5",
    "body": [
        {
            "type": "TextBlock",
            "size": "extraLarge",
            "weight": "bolder",
            "text": "Lorem Ipsum",
            "wrap": true
        },
        {
            "type": "TextBlock",
            "text": "Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. \n\nIt has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. \n\nIt was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum.",
            "wrap": true
        },
        {
            "type": "TextBlock",
            "size": "small",
            "weight": "lighter",
            "text": "Lorem Ipsum",
            "wrap": true
        }
    ],
    "msteams": {
        "width": "full"
    }
}

Sample Code Language

No response

Sample Code

No response

Start by reproducing the supplied Adaptive Card JSON in new Teams and classic Teams, focusing on the missing spacing between paragraphs. Trace the rendering path responsible for newline handling and verify the result by confirming that the same card preserves paragraph spacing in new Teams without changing its appearance in classic Teams.