Splitting a block at the end.
In an existing contenteditable with <p>Hello World</p><p>Goodbye Space</p> in it place the cursor at the end of World and hit the enter key. Note any unusual behavior.

Chrome (Desktop)

Safari (Desktop)

Firefox (Desktop)

Android API 28

Android API 27

Android API 26

Android API 25

Android API 24

Android API 23

iOS 11.4