Power Platform Community Forum Thread Details

What I'm trying to do
I have a Question node that renders an Adaptive Card with a single Input.ChoiceSet (list of SharePoint sites). The user picks a site and clicks a Continue submit button. After submit, the topic should move to the next node (a Message node that echoes the selection).

What actually happens
The card renders fine and I can select an option. When I click Continue, nothing happens — no error, no next message, no branch taken. The topic appears to hang indefinitely. The output variable I've mapped stays empty.

What I've already checked

Input.ChoiceSet id matches the node's Output property name exactly.
associatedInputs is set to "auto" on the Submit action.
Tried JSON Adaptive Card as well as Formula both are getting stalled.

Questions

Are there known conditions where an Action.Submit on an Adaptive Card fails to advance in Copilot Studio?
Is there a required schema element I might be missing to route the submit back to the topic?
Is there a way to inspect the raw submit payload the runtime receives, to confirm whether it's arriving at all.

Any pointers or working sample topics appreciated.

Formula Card Code:

{
  '$schema': "https://adaptivecards.io/schemas/adaptive-card.json",
  type: "AdaptiveCard",
  version: "1.5",
  body: [
    {
      type: "TextBlock",
      text: "Select a SharePoint Site",
      weight: "Bolder",
      size: "Medium"
    },
    {
      type: "Input.ChoiceSet",
      id: "selectedSite",
      label: "SharePoint Site",
      isRequired: true,
      errorMessage: "Please select a site",
      choices: Topic.UserAvailSites,
      style: "filtered"
    }
  ],
  actions: [
    {
      type: "Action.Submit",
      title: "Continue",
      associatedInputs: "auto",
      data: {
        action: "submitSite"
      },
      style: "positive"
    }
  ]
}

Categories:

Building Copilot Studio chatbots in Microsoft Teams

Calling actions from Copilot Studio

I would test in this order:

Replace Topic.UserAvailSites with two hard-coded choices.
Remove the data property from Action.Submit.
Verify the Question node output property is exactly selectedSite.
Replace the Input.ChoiceSet with an Input.Text to confirm the Question node itself is functioning.
Test in both the Copilot Studio Test pane and another supported channel to determine whether the issue is channel-specific.

If the hard-coded ChoiceSet works but the dynamic one doesn't, the issue is almost certainly with the format of Topic.UserAvailSites. If both versions stall, you're likely encountering a runtime bug in the current Copilot Studio experience.

If you can share the value or Power Fx expression that populates Topic.UserAvailSites (or a sample of its contents), I can verify whether it's in the format expected by Input.ChoiceSet.