Website not displayed correctly on mobile with safari browser

website is responsive & working fine with chrome browser on all device but when using safari browser, its working fine on pc view but not on mobile…on iphone (safari browser) website is getting displayed only on vertically half screen with below area remaining white….I’ve checked it with browserstack.com and also on an iphone with me. (I am using colormag theme)

Additionally when I deactivate the wp mobile menu plugin, website works well on mobile safari browser as well.

I am attaching my website link. Kindly help me out with this.

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