Styling action.submit button doesn't work in Adaptive card

I've tried adding style for a Submit button in the designer as well as in the local setup, but it doesn't seem to work in any of the Adaptive cards' versions.

For some reason, when multiple items are being rendered, the last button has got another background color for which I tried adding a style but it doesn't work.

{
    "type": "AdaptiveCard",
    "$schema": "http://adaptivecards.io/schemas/adaptive-card.json",
    "version": "1.2",
    "actions": [
        {
            "type": "Action.Submit",
            "title": "Submit",
            "style": "destructive"
        }
    ]
}