headers icons disappear in mobile

Hello guys,

I have a simple problem. There is no problem in computer but when I go to my website in mobile, I encounter a problem. If I go to a post in mobile, my header icons appear. But when I back to my homepage my header icons (homepage, navigation, search,random post) disappear. How can I fix this problem? Please help me.

You can see the problem from these pics : https://ibb.co/ypr9snc
https://ibb.co/f8QncVy

and my website is astronomhub.com

• This topic was modified 4 years, 8 months ago by astronomhub.
• This topic was modified 4 years, 8 months ago by astronomhub.

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