Menu icon not displaying in mobile

Hello,
I am facing a strange issue that menu icon is not showing in my website on mobile. It just shows cross instead of menu icon. Also in pc, page store has two sub pages. So downward arrow is also not showing beside store. I am running astra theme. I tried to switch theme and this problem does not appear. I also tried disabling my plugins to see whether problem solves but no result.

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