[antiuniverse]

I suspect it has something to do with the captive wifi webview being (frustratingly) modal.

I was staying at a hotel recently that wants you to put in your rewards account credentials at the captive portal page, but I couldn't switch over to 1Password to retrieve those credentials without iOS dismissing the portal page and leaving me with no easy way to get back to it. At which point the internet is working, and you're no longer "captive," but the half-completed process implies you want them to bill your room $15 for a day access pass...