This is a reproduction for facebook/react-native#36494 based on a base RN 0.72 RC1 app.

Reproduction code is in Repro.tsx

To repro, launch the app on iOS and see that the <TextInput> contains:

Lorem ipsum dolor sit amet, consectLorem ipsum dolor sit amet, consectetur adipiscing elit

But value is initialized with

Lorem ipsum dolor sit amet, consectetur adipiscing elit

This happens with multiline and maxLenght, when the initial value is longer than maxLenght / 2. onChangeText and onChange are triggered when the component mounts, with value prepended to the actual value until it fills maxLenght.

This does not happen on Android.