Purchase button becomes noninteractive after entering email

[briotwitch]

Hi I was attempting to purchase an online order that had limited quantities, the vendor pops up at a certain time. After I entered my email, it sends the text message to confirm it's me, I enter in the text code and it accepts. Now all the buttons, including the purchase button, become noninteractive. I've tried this on Firefox/Chrome and mobile, even Edge which has no addons and has default settings. I was able to finally purchase after using Google Pay through Chrome. On Firefox mobile the blue button to purchase just disappears after confirming my square email.