Turn off Shake to Undo
Shake to Undo has been one of iOS’s longest-running annoyances. You’ve probably run into it yourself. And while being able to quickly undo typing is handy, there are now alternatives to Shake to Undo in iOS 13.
For one, you can swipe forward or backwards with three fingers to undo and redo text typing. With that in mind, do yourself a favor and disable Shake to Undo by heading to Settings > Accessibility > Touch > Shake to Undo.