Header Button "Explore" overlabs with content page in Mobile

I just noticed the Header Button “Explore” overlaps with content page while viewing in Mobile. The header page does not adjust as per the text input in header.

Is this a bug?

Nope, the image doesn’t adjust, it just scales down as it should while keeping the aspect ratio.
Go to Customize > Header area > Header image and add a header image specifically for small screens. Make sure the mobile image is as close to a square as possible.