Double widget bubble rendered for a single MCP tool call

ChatGPT Apps SDK
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1

Posting to see if anyone else has hit this or has guidance from OpenAI.

When a widget-bound MCP tool is invoked from a single user message in ChatGPT, two identical widget bubbles render instead of one. Both show the loading skeleton, and eventually both resolve to the same single output. Screenshot attached.

I initially assumed this was something in our MCP server’s metadata and spent time debugging on the server side without finding a reliable fix.

I then noticed the exact same double-bubble behavior on a different ChatGPT app. Same symptom: single user message, two skeleton bubbles bound to that app’s widget template.

That strongly suggests this is a ChatGPT-side rendering behavior with widget-bound tools.

Questions:

  1. Has anyone else seen this?
  2. How do we fix it?

Screenshot 2026-06-02 at 11.37.43 AM
Screenshot 2026-06-02 at 11.37.43 AM513×316 14.2 KB

2

Have you found any solutions to this? It also happens to our app that is under development

3

Nope, nothing as of yet. Any idea of how we can contact someone from OpenAI and can get this bug prioritized?

4

Not sure how we can get someone from OpenAI to look at this post.

I guess they are already under review of this as multiple people have reported it.

If you find the fix or any updates, let me know :slight_smile: I’ll do the same