Posthog visitor IPs show as Cloudflare IPs

X-Forwarded-For

vercel.json

{
  "rewrites": [
    {
      "source": "/ingest/static/:path(.*)",
      "destination": "https://eu-assets.i.posthog.com/static/:path*"
    },
    {
      "source": "/ingest/:path(.*)",
      "destination": "https://eu.i.posthog.com/:path*"
    }
  ],
  "headers": [
    {
      "source": "/(.*)",
      "headers": [
        {
          "key": "X-Real-IP",
          "value": "{%CF-Connecting-IP%}"
        },
        {
          "key": "X-Forwarded-For",
          "value": "{%CF-Connecting-IP%}"
        }
      ]
    }
  ]
}