Same thing here, on a different cloud. When we notice someone is using a form, we fire a no-op request to the function that will handle the data from the form

Same thing here, on a different cloud. When we notice someone is using a form, we fire a no-op request to the function that will handle the data from the form so that it is less likely to be cold when the user is ready to proceed. (We could get better results by switching to a different implementation language; but we have a body of code already working correctly aside from the extra second or two of cold start.)