unable to type certain letters when filling in a form

I am using Adobe Acrobat Reader DC on a Windows 10 Laptop with a UK keyboard.

When typing text to fill in a form, pressing many of the letter keys on my keyboard doesn't have any effect.

Below is a screenshot of me trying to type all 26 letters of the alphabet in alphabetical order. As you can see, only 1/2 those letters appear

My keyboard is working fine, and this problem only surfaces when using the Reader program on the desktop. There is a browser version of the program - i can get all letters to appear there.

Anyone else knows how to solve this? I currently have to type each field into MS Word, then copy and paste to fill in the form. It's rather annoying.

Thanks all