You explicitly set to spoof X-Forwarded-For, therefore the addon adds a X-Forwarded-For header entry into every request you do with whatever you configured in the addon. It is trying to "tell" all websites you visit that your current public IP (which is 109.202.107.15 in the screenshot, hence, the AirVPN exit server) is a proxy for the IP 184.122.97.74. It's only informational, nothing gets sent to 184.x.x.x IP. There'd be no way to contact it, anyway, since the above proxy must be used. And th