On an iPhone 6 running iOS 12.1 with Minecraft 1.9 and the solutions detailed above are not working. Like the others, this issue came up when I updated my daughter's xbox.com privacy settings with her still logged in on the app. Toggling airplane mode lets me get past the splash screens (it dies at the while screen when it can access the internet) but it says "signing in to XboxLive one the left side and then freezes after about 4 seconds and returns to the home screen. In those 4 seconds I'm able to get into settings/profile but none of the options there have any impact on the issue.
On an iPhone 6 running iOS 12.1 with Minecraft 1.9 and the solutions detailed above are not working. Like the others, this issue came up when I updated my daughter's xbox.com privacy settings with her still logged in on the app. Toggling airplane mode lets me get past the splash screens (it dies at the while screen when it can access the internet) but it says "signing in to XboxLive one the left side and then freezes after about 4 seconds and returns to the home screen. In those 4 seconds I'm able to get into settings/profile but none of the options there have any impact on the issue.