Flutter version:

Flutter (Channel dev, v1.5.8, on Mac OS X 10.13.6 17G4015, locale en-CN)

Code

Just any simple textfield will do:

       TextField(
          decoration: InputDecoration(filled: true, fillColor: Colors.white, border: InputBorder.none),
          maxLines: 5,
        ),

Screenshot and Screencast

The Unexpected Screenshot With Chinese Chars

The Working Screenshot With En Chars

The Screencast (Gif file)

Issue Description

From what you can see from the above screenshot and screencast, TextField's text selection start and end buttons are disappeared when text starts with Chinese characters, but working fine when text start with English characters.

Thank you very much for your help.