Curious bug on menu

Today i found a curious bug on my header menu. It works fine on all pages except my blog page where the submenus are down.
Main page working :
Blog page down :
Help will be great.

Hello there,

I hope you are doing well today.

Did you add any new code to the theme? Also, please disable any third party plugins you have active and reload the page to see if the issue persists.

Best Regards,