Works Perfectly in 19.0 I also looked for any import css code in their source, and it looks like they don't use import, which is sometimes has issues with rend

Works Perfectly in 19.0 I also looked for any import css code in their source, and it looks like they don't use import, which is sometimes has issues with rendering the css. I would check the console in your browser and try to investigate this further. I didn't get any errors in my console.