Visualization web app (react, neovis.js) is making random image when loading page

I have made a web app with React and it's using neovis.js to visualize data. It's working well, but I have one problem that occurs when loading page or refreshing page.

Problem is, when loading the app, it's working slow and it's loading visualization that includes Game of Thrones -stuff, although my database has no data like that. So where is this data coming from? It was Game of Thrones related example that I looked before creating this my own app, but I don't understand where that data is visualized and why.

After this slow visualization of GoT data my app works fine and all fetched data is as expected.

And this is a problem that is not occured when running code locally like "npm start". It only occurs when using app in external server where code is running also.

Thanks for help!

Possibly the neovis.js configuration is referencing a demo Game of Thrones dataset instead of your Neo4j datbase? Can you share the neovis configuration object?