My biggest frustration for this is the typing completion on Android. I'm typing, and while I'm typing another character for the word, I see the word I want listed above the keyboard. But just as I hit the word, the suggestions update and my word is replaced by another. And often my word is still listed, but in a different place, which js incredibly annoying. Or sometimes the word disappears, despite it still being a valid completion for the word I'm typing. Why suggest it and then remove it?