[TextInput] Maxlength bug in specific situations

[ahce]

• Review the documentation: https://facebook.github.io/react-native
• Search for existing issues: https://github.com/facebook/react-native/issues
• Use the latest React Native release: https://github.com/facebook/react-native/releases

Environment

React Native Environment Info:
    System:
      OS: Windows 10
      CPU: (4) x64 Intel(R) Core(TM) i5-5200U CPU @ 2.20GHz
      Memory: 4.29 GB / 11.87 GB
    Binaries:
      Yarn: 1.12.3 - C:\Program Files (x86)\Yarn\bin\yarn.CMD
      npm: 6.4.1 - C:\Program Files\nodejs\npm.CMD
    IDEs:
      Android Studio: Version  3.1.0.0 AI-173.4907809
    npmPackages:
      react: 16.6.3 => 16.6.3
      react-native: 0.57.8 => 0.57.8

Description

In a specific situation maxLength don't works, when a special character is inserted between a number, a character and a letter: (maxLength: 5, value: 123-r) 123[insert here "&"]-r the result is 123&-
See the demo.

Reproducible Demo

TextInput MaxLength Bug

[dulmandakh]

This is expected behaviors. maxLength work on characters, and doesn't distinguish between special char, number or letter.