- Fixes an issue on iPad Pro that prevented the iPad Smart Keyboard from working after connecting to a captive Wi-Fi access point
I was sure mine was broken while I was staying with a family member in a hospital, then it "fixed" itself when we moved back home. I'd love to read a description of what caused this bug, I mean "use a captive wifi portal" → "hard wired keyboard stops working until reboot" isn't really where I'd look for a bug.
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...
Here's the Apple forum thread with 19 pages of customer reports: https://discussions.apple.com/thread/8075772
Fairly confident it's just the smart connector driving the input.
I don't know the details about how the Smart Keyboard works but I'm confident it doesn't use WiFi.