[Adaptive Card] Issue with CodeBlock line numbers and more

I have a simple adaptive card containing a code block with multiline SQL in it:

from botbuilder.core import CardFactory, MessageFactory, TurnContext

async def send_sql_card(context: TurnContext):
    SQL_QUERY = """SELECT
            order_date,
            customer_id,
            SUM(quantity * unit_price) AS revenue
        FROM catalog.sales.order_items
        WHERE order_date >= DATE '2026-01-01'
        AND order_date < DATE '2026-06-01'
        GROUP BY
            order_date,
            customer_id
    """

    activity = MessageFactory.attachment(
        attachment=CardFactory.adaptive_card(
            {
                "type": "AdaptiveCard",
                "$schema": "http://adaptivecards.io/schemas/adaptive-card.json",
                "version": "1.6",
                "msteams": {"width": "full"},
                "body": [
                    {
                        "type": "CodeBlock",
                        "codeSnippet": SQL_QUERY,
                        "language": "sql",
                    },
                ],
            }
        )
    )

    await context.send_activity(activity)
 

This worked fine until maybe a few weeks ago. Now, there are two issues:

Line numbers appear twice:

Not all lines are being shown:

It says "Expand (11 lines)", but it only shows 9.

This happens on Teams Desktop - it looks fine on the web version.