Hi,
@kharisblank sorry, yesterday I used my previous backup to revert theme update to version 2.14, but now I updated the theme to 2.15 again and again the issue with menu appeared, you can see it now on a website.
If you have any idea how to fix this, please let me know.
@macm2 Thanks for your comment. Actually I have a woocommerce plugin but haven’t started using it yet. Maybe for the future I will just delete it.