Allways getting "Live-Update-Verbindung verloren. Erneut verbinden" Notification

I installed Youtrack on a new Server as Linux Service with the JAR installation, behind a proxy. I now always get the message: "Live-Update-Verbindung verloren. Erneut verbinden". Everthing is working as far as I see, just the notification is anoying.

• Installed version: Build 2022.2.60480
• Used browser: Google Chrome
• OS: Ubuntu 22.04
• Using nginx proxy with the following settings.

```

add_header Strict-Transport-Security max-age=31536000;

location / {
    proxy_set_header X-Forwarded-Host $http_host;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_set_header X-Forwarded-Proto $scheme;

    proxy_buffers 8 64k;
    proxy_busy_buffers_size 128k;
    proxy_buffer_size 64k;

    client_max_body_size 10m;

    proxy_http_version 1.1;
    proxy_pass http://localhost:8080/;
}

location /api/eventSourceBus {
    proxy_cache off;
    proxy_buffering off;
    proxy_read_timeout 86400s;
    proxy_send_timeout 86400s;
    proxy_set_header Connection '';
    chunked_transfer_encoding off;

    proxy_set_header X-Forwarded-Host $http_host;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_set_header X-Forwarded-Proto $scheme;
    proxy_http_version 1.1;
    proxy_pass http://localhost:8080/;
}

```