Connect streams logs unexpected warnings when third-party scripts and extensions use postMessage

[bmitchenko]

Problem Description

The Amazon Connect streams library appears to be generating warning logs when unrelated third-party scripts and browser extensions send postMessage events within the browser.

Steps to Reproduce

1. Integrate Amazon Connect streams into a web application
2. Have third-party scripts (e.g., Stripe) or browser extensions (e.g., Angular DevTools) that use postMessage
3. Open browser console
4. Observe warning logs appearing when these third-party scripts or extensions send postMessage events

Current Behavior

Amazon Connect listens to all messages in the browser tab using:

window.addEventListener("message", this.postMessageHandler)

When it receives postMessage events from unrelated sources, it logs:

[siteProxy]: Message came from unexpected iframe. Not a valid CCP. Will not connect

Expected Behavior

The library should handle unrelated postMessage events without generating misleading warning logs in the console.

Environment

• Browser: Chrome 133.0.6943.143 (Official Build) (64-bit)
• amazon-connect-streams version: 2.18.1

[jagadeeshaby]

We acknowledge the issue and taking action to push out a fix for the same.

thank you.

[github-actions]

This issue is stale because it has been open for 90 days with no activity. Remove stale label or comment to keep this active.