Checkout page fields display error

Hi,
I have found an error in both of your demo and theme files,

After purchasing any product when i get redirected to checkout page

https://cohhe.com/demo/shopera/checkout/

the last checkout field of select country is not being displayed correctly, and is being overwrite by its label

please follow following images
Image 1 From your Demo Theme

Image 2 From my local host
Please fix this issue as soon as possible, till then please suggest me how do i remove this error