Menu Dissapears when resizing

Hi! It’s me again. I just noticed that the menu dissappears on one of my older sites when in responsive view. No menu on phones or ipads or on the screen when I resize the window. It used to work perfectly, I’m not sure what happened. I didn’t touch anything. This is the website

I don’t see any problems with this website. Menu does work properly on smartphones. On iPad in portrait and landscape mode it should still display regular menu and not mobile menu. Mobile menu comes for devices that are one pixel smaller than iPads. It is done intentionally.

Thank you so much for responding! It must be my phone or a browser. Thank you!