Hey dude, I believe the issue is actually a simple fix. This help post about studio customization discusses in more depth, but essentially end users will see slightly different things on those buttons depending on whether they are a guest or member.
Hidden in the bottom right of the Studio Manager page is a dropdown to “View As”. This lets you view your studio as a guest, a member etc. If you select View as a Guest in it, you will see what they see and can customize the text. So when you customize text while on “view as owner”, you aren’t actually changing what a guest sees on the hero page.
For your convenience, I will include a screenshot of the mentioned interface element.