Slider image load delay

First of all, Thank you so much for all the support during developing my website using Sydney Theme.
Now the website is live. But I have a small problem.

Slider images are loading after the text appears. Witha white back ground it doesn’t look good.and also the background images are loading very slow as well.

What suggestion you have for me? How can I fix it? I have used WP Smush to reduce the image size.

Hello @mothergoose,

Can you please provide a link to your website?

Kind Regards, Roman.