AutomaticKeepAliveClientMixin can not keep second page state #16690
Description
i have a application use BottomNavigationBar and TabBarView which contains three pages,
app like this
but when i tap second bar item show second page,and tap first bar item ,tap third bar item, and tap second bar item, i saw second page state lose.
only second page hanppend.
i found four page also hava this bug,only second page has.
Flutter Doctor
Doctor summary (to see all details, run flutter doctor -v):
[✓] Flutter (Channel dev, v0.2.12-pre.4, on Mac OS X 10.13.4 17E199, locale zh-Hans-CN)
[!] Android toolchain - develop for Android devices (Android SDK 27.0.1)
! Some Android licenses not accepted. To resolve this, run: flutter doctor --android-licenses
[✓] iOS toolchain - develop for iOS devices (Xcode 9.3)
[✓] Android Studio (version 3.0)
[!] IntelliJ IDEA Ultimate Edition (version 2016.3.2)
✗ Flutter plugin not installed; this adds Flutter specific functionality.
✗ Dart plugin not installed; this adds Dart specific functionality.
✗ This install is older than the minimum recommended version of 2017.1.0.
[✓] Connected devices (4 available)
! Doctor found issues in 2 categories.