[cocher]

Your VPN may be carrying ordinary page requests while the browser sends peer-to-peer traffic along a different route. Websites use that channel for calls and other real-time features, but a page can access it even when you aren’t making a call. The second public address may be appearing because of a WebRTC leak. Before visiting more of those sites, read what a WebRTC leak is here: https://gologin.com/blog/what-is-a-webrtc-leak/ . Run a WebRTC-specific check with the VPN active and see which public address the browser returns. If it still shows the address from your internet provider, use a browser that routes WebRTC through the protected connection.