Registration on mobile: Can't type in the boxes/fields...

Hi, I have an issue i have been trying to solve, The registration process works fine on full desktop and tablet, but on mobile or with the window minimized to mobile size, the registration box below First Name and Last Name fields don't allow you to type in them. If you click on them nothing happens as if they are blocked. This even happens when you are logged in and go to edit user profile. On mobile the boxes can't be typed in.. I don't know why. Any idea as to why this would happen? It may have something to do with CSS but i don't know, I tried changing the box sizes and other css to check and it didn't solve the problem so it may be a bug. I provided the URL to the registration so you can try it yourself on the mobile screen size. If you could keep the URL confidential that would be great. Thanks!