https://thenextweb.com/security/2019/09/25/ios-13-bug-lets-third-party-keyboards-enable-full-access-without-your-permission-heres-a-fix/

Just as Apple made available iOS 13.1 and iPadOS after a rather messy rollout, the iPhone maker is warning users of a security issue impacting third-party keyboard apps.

The bug — unresolved in its latest updates released yesterday — could potentially allow keyboard makers to gather keystroke data without your knowledge and relay it back to their servers.