With same STR with bug 217692, you'll see only `input` event is fired. However, its `inputType` (and some other `InputEvent` attributes) are `undefined`. I think that the `input` event is not fired as an `InputEvent` instance. The value should be `"insertReplacementText"`. https://www.w3.org/TR/input-events-2/#interface-InputEvent-Attributes
<rdar://problem/70304775>