Switching keyboard language leads to a strange resided keyboard in the Blogger app.
In the Mail app, the top of an email is not showing up occasionally.
Other glitches that cannot be shown visually are:
- keyboard is a bit slow and unresponsive when writing a long text (like this post)
- opening apps is a bit slower
- wallpaper orientation does not follow the device orientation once in a while
- keyboard sound feedback is dropping randomly
Most issues are happening on the iPad 4th generation. If you plan to upgrade to iOS 9 public beta on your iPad 4, you wait a bit for next release. It's not that bad, but annoying nevertheless.
The iPhone 6 is working like charm for now.