I just talked with Gameloft Customer Support. The issue is due to the game not having had an update in a while (Android was updated in October), and the Gameloft service was patched for Android, causing it to crash on Windows (both Windows Phone and Windows 8). I'm fairly certain the issue also occurs on iOS, which last had an update in 2013.
They confirmed that they have engineers working on a patch for it, but they do not have an ETA for when it will be released, nor do they know why certain people are able to still connect.
