RNTester Minimum Reproducible Example

A Minimum Reproducible Example that triggers the Null Pointer Exception
Runtime Error NullPointerException:tempt to invoke virtual method 'android.graphics.drawable.Drawable android.graphics.drawable.Drawable$ConstantState.newDrawable(android.content.res.Resources)'

The following are the conditions that trigger the runtime error:

1) a large list (>100) TextInputs with key prop
2) with FlatList passing prop data=[{key: 1, key:2,.., key:5000]]
3) trigger re-render to ensure the NPE Runtime Error is triggered

The example is built using hooks useEffect similar to componentDidMount.
Original post is here
facebook#17530 (comment)

RNTester/js/examples/TextInput/TextInputKeyProp.js

@@ -0,0 +1,61 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @format
+ * @flow
+ */
+
+'use strict';
+
+const React = require('react');
+const {View, TextInput} = require('react-native');
+const {useEffect, useState} = React;
+
+function TextInputKeyProp() {
+  const [startKey, setStartKey] = useState(0);
+
+  const updateKey = () => {
+    setStartKey({
+      startKey: startKey + 100
+    });
+  };
+
+  useEffect(() => {
+    const interval = setInterval(updateKey, 3000);
+    return () => clearInterval(interval);
+  }, [])
+
+  const textInputs = [];
+  for (let i = 0; i < 1000; i++) {
+    const key = (startKey + i).toString();
+    console.log("key", key);
+    // REMOVE KEY PROP TO FIX THIS
+    textInputs.push(
+      <TextInput 
+        style={{ height: 40, borderColor: 'gray', borderWidth: 1 }}
+        key={key} />
+    );
+  }
+
+  return (
+    <View>
+      { textInputs }
+    </View>
+  );
+}
+
+exports.title = '<TextInputs with key prop>';
+exports.description = 'Periodically render large number of TextInputs with key prop without a Runtime Error';
+exports.examples = [
+  {
+    title: 'A list of TextInputs with key prop - Re-render every 3 seconds',
+    description:
+      'A list of TextInputs with key prop re-rendered every 3 seconds will trigger an NPE Runtime error.',
+    render: function(): React.Node {
+      return <TextInputKeyProp />;
+    },
+  },
+];

RNTester/js/utils/RNTesterList.android.js

@@ -101,6 +101,10 @@ const ComponentExamples: Array<RNTesterExample> = [
     key: 'TextInputExample',
     module: require('../examples/TextInput/TextInputExample'),
   },
+  {
+    key: 'TextInputs with key prop',
+    module: require('../examples/TextInput/TextInputKeyProp'),
+  },
   {
     key: 'TouchableExample',
     module: require('../examples/Touchable/TouchableExample'),