I recently started using a service called Grammarly on my Mac. The software does proofreading via a browser extension and a desktop text editing app. It’s great for people who create a lot of documents (security architects) but is useful in general.
Because of iOS sandboxing the only way Grammarly works on my iPad Pro is via their third-party iOS keyboard. However, I was disappointed to learn that when an Apple Smart Keyboard is attached, iOS disables all third-party keyboard apps. I can only use Grammarly when typing directly on the iPad Pro display. But my typing speed is significantly reduced compared to a physical keyboard like the Apple Smart Keyboard. Argh!
I also discovered that there is a bug in the Apple Smart Keyboard. Sometimes when the arrow navigation keys are used, iOS deletes all content in the edit screen. Shaking the iPad Pro does not always prompt iOS to activate the “Undo” feature.