Non-adaptive theme in mobile viewing

Hello,
I have some problem with mobile viewing of this theme. Is not a misconfiguration of my setup because I have the same problem on https://demo.mageewp.com/onetone/.
As soon as I open the site I view entire page shrunk and aligned to the left. After 2-3 seconds it is displayed correctly, but the problem reappears in each page section when I scroll down.
Please, seee the attachment.
screenshot on velathemes.com