No problem, I was surprised I never encountered this thing. Yeah, it needs a prevention mechanism to not send the same submission many times.
I think in most cases the redirect is almost immediate that one never has the chance to spam the button. But malachiel's site is maybe like 0.3s slower in responding, so in his case his users might hit the button again because the redirect is not immediate as one would expect as there is a very small delay.
I think in most cases the redirect is almost immediate that one never has the chance to spam the button. But malachiel's site is maybe like 0.3s slower in responding, so in his case his users might hit the button again because the redirect is not immediate as one would expect as there is a very small delay.