1. Either from the Administration page or from the namespaces dropdown, click Add Namespace.
2. Without typing anything for the namespace name, click the Preferences tab.
3. For the key, type two characters: "ab". The result is that it actually renders the reverse, "ba", because after typing the first character, the focus of the cursor goes to the beginning of the text. Only this initial interaction seems to have this bug.
Should be reproducible with just the above steps, but see gif as an example: http://recordit.co/fCqQxmqJFU