HELP - Page titles in Navigation Folder are Lowercase on Mobile Only

My site (7.0, Beatrice Template - it's a legacy) contains a folder in the navigation. In Design > Site Styles > Navigation, we have the text transform set to uppercase. When the folder is opened on desktop, the page titles inside are transformed to uppercase successfully, as shown in the photo. 

However, on mobile, the site titles inside the folder are transformed to lowercase. The rest of the navigation titles are still uppercase. I attached a photo. Help!

Site URL: www.maryrangallery.com

@tuanphan wanna help a girl out 🤣 👉👈

Thank you so much, you're the best.