Customizer Hero Section Editing Issues

Hi, I’m not sure if this is the correct place to go but I am having trouble editing the hero section of a website page. I am only trying to capitalize one letter to match the other words in the hero section but when I do, the font resets and the section height is reduced, making it look unappealing. I was wondering if this issue can be easily resolved.

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