App sending request to ably.io and I don't know why

After successful build of the Angular app, UI of the app is loaded on the deploy preview but in the console I see this error:

Access to resource at 'https://realtime.ably.io/event-stream?channels=dvc_client_c993fa0dc05522c22f1363a98a334a47d1dd2123_v1&v=1.2&key=azZpGQ.64zbWw:RXCvOj0NO8V5CwpiNhiImhd1n7zsiS0QXgcOWElBxg4' from origin 'https://app.netlify.com' has been blocked by CORS policy: The value of the 'Access-Control-Allow-Origin' header in the response must not be the wildcard '*' when the request's credentials mode is 'include'.

I am trying to understand where is this request to https://realtime.ably.io coming from. Nothing in my app uses ably, at least not that I am aware of.

First, the app sends this request:

https://featureflags.netlify.com/v1/sdkConfig?sdkKey=dvc_client_7b35e45b_dd67_444b_b114_46804faa770d_ab0f202&user_id=anonymous-quokka&isAnonymous=false&email=&lastSeenDate=1707746108484&createdDate=1707746108484&platform=web&platformVersion=Chrome+121.0.0.0&deviceModel=Mozilla%2F5.0+%28Windows+NT+10.0%3B+Win64%3B+x64%29+AppleWebKit%2F537.36+%28KHTML%2C+like+Gecko%29+Chrome%2F121.0.0.0+Safari%2F537.36&sdkType=client&sdkVersion=1.13.5

And then the request to ably that in Network tab seems like it fails, but the status code is 200. :thinking:


https://realtime.ably.io/event-stream?channels=dvc_client_c993fa0dc05522c22f1363a98a334a47d1dd2123_v1&v=1.2&key=azZpGQ.64zbWw:RXCvOj0NO8V5CwpiNhiImhd1n7zsiS0QXgcOWElBxg4

Deploy preview:
https://deploy-preview-7--aiphoto.netlify.app/

Can somebody point me in the right directions?

As a guess, probably something to do with the Netlify Drawer that shows on the deploy previews

See

@dig Looks like a safe guess to me.

The URL is in the response of the https://featureflags.netlify.com/v1/sdkConfig call.