Changing header font size for mobile has no effect

Hello,

When using the responsive editor, it is not applying changes to font size on the header element. I have no idea why it doesn’t seem to save; there is no inline CSS and no errors in the dev console. It initially appears to save the changes, but as soon as I refresh the page it reverts to the default breakpoints set in Appearance --> Customize. I don’t want to change the defaults for all the h1 header elements, just this one. Why might the changes not be sticking?

I am using the latest versions of Beaver Builder theme and Beaver Builder Pro plugin. My site is https://rinsites.com. I am trying to change the first “Rinsites” header for mobile. Let me know if you need more info.

Thanks,
Rin