My apologies @liam, I mistook the last thread you replied in as your own (I’ve been working too long today) however without a link it’s pretty difficult to diagnose any issues.
I went to the provided checkout page and confirmed the same issue on my end, but strangely it appears like the fields in that section all deselect immediately after they’re clicked. I don’t see any console errors, so I’m thinking this may be a bug.
Can you try clearing all of your styles from that section and republishing to confirm it’s not a styling issue? If that doesn’t help, I’d recommend contacting support regarding the issue.
Edit: I went ahead and checked a current ecom project I’m working on and see the same issue, although my checkout is disabled at the moment. Assuming yours isn’t disabled like mine, this looks to be a bug on Webflow’s end.