Wix-paid-plans issues with the mobile site

I have followed these instructions for personalising the way I ask members to purchase a paid plan (https://www.wix.com/corvid/reference/wix-paid-plans/purchaseplan), and on the desktop view of the website it seems to work fine, a lightbox appears for the user to enter their details.
However, on the mobile site when the same button is pressed the lightbox is so far up the page that the top of the lightbox is cut off, which means users can’t enter all the information and they also can’t close the lightbox.
Is there a way I can format the lightbox, or get it working better with the mobile site?

Fixed. I just created a release candidate and tested it on a mobile, and it works fine. It’s just that the mobile emulator is not displaying correctly.