It appears that tapping on URLs, hashtags, and mentions on a
TWTRTweetDetailViewController doesn’t work on iOS 8. On iOS 9, those taps open appropriate links in Safari as expected. (They’d probably open in the Twitter app, if it were installed.) I’m at a loss as to why opening those links would be OS-dependent, but that seems to be the case. No console output I’ve noticed to explain the failures.
Is this expected behavior, or a bug?