Steps to reproduce the behavior
Add the following code to your app.js of a classic project:
Any input will be duplicated in the TextView itself. For example pressing 'H' will result in 'HH' appearing in the TextView.
The value of the text view can be assigned without any side effects.
This is required for the two-way binding in Vue.js. The iOS TextField does not have this issues, neither does any of the text widgets on Android.