Hey!
On Theme Settings -> Header -> Header Layout -> Haeder above the content is ON
Header -> Apperance – Header Background – Transparent
After I saved Header Layout settings, sticky menu background is transparent. All the time it was okay! When Header Background choose a color, then works sticky menu background, but it isn’t a little bit transparent like it was before and then background is in front of content. I don’t want header background. I just need to get back sticky menu background.