Issue when use TextInput inside Window

Hi,

my render function look like this
```
render() {
return (

);
}
```
When enter value to both TextInput and swap to another tap (in my case using Chrome just hit F12 for developer tools). The input under **Window** will change to blank while the input outside **Window** still has its value.

Start by reproducing the supplied Window and TextInput example in Chrome, then inspect the Window and TextInput entry points to determine why the nested input loses its value after developer tools are opened. Done means the input inside Window retains its entered value when switching to and from another tab, matching the input outside Window.

Written by the indexing model from the issue text.