When submitting a post, the post field messes with SwiftKey's autocorrect and predictive typing. This isn't a bug with SwiftKey as it only happens with GBATemp's post submission field. I have to type really slow for it to not happen. Here's an example: Warning: Spoilers inside! SwiftKey is free, so anyone can test this. The Chrome build is 64.0.3282.123. Edit: The fix has been pushed to the stable build. Update now.