- Main timeline screen: you can swipe left/right for your time line, discover and activity. It is bad UX choice when you try to read your timeline with one hand scroll down the page. Many once in a while your swipe down gesture will trigger the swipe left/right and is utterly annoying.
- It does not play well with Instagram the top social app as picture is displayed as link and not shown.
- The load more tweets implementation is broken. After tapping "Load More Tweets", it brings you to any tweet in your timeline, and you are lost to where were before.
- It does not support GIF natively.
Other issues:
- Follow named brands are a waste of time on Twitter as they repeatedly tweet the same news.
- Twitter is major pain-in-ass email spammers. There are 7 email notifications type you receive from just Twitter for marketing. The options should be off by default. Why give users a chance to hate you?
Irony is Twitter is pushing to be the mobile app platform of choice but they don't have the best mobile client.