Preloader is not smooth

Dear,

Please naviguate on my site : [ redundant link removed ]

You’ll notice that the preloader is not running smoothly.

I show you hereby a video with the preloader on admin side to prove that the gif is correct and running smoothly in the gallery : https://gevcen.tinytake.com/tt/MzY4MjI2NV8xMTE3Nzg2Mg

Can you help to fix it?
Thanks

• This topic was modified 5 years, 3 months ago by Jan Dembowski.

The page I need help with: [log in to see the link]