translation, offset, random hide issue

[nitneuq33]

flare version : flare_flutter: ^1.5.2
Here is two simple translation example where I have problems...
I use`

new FlareActor("assets/flare_test.flr", alignment:Alignment.center, fit:BoxFit.contain, animation:"1" , controller:controls,
`
to lanch flare animation

I init final FlareControls controls = FlareControls();

I control with

   new RaisedButton(
            child :Text (" key 1 translation1"),
            onPressed: (){
              controls.play("1");

            }),
        new RaisedButton(
            child :Text (" key 2 translation2"),
            onPressed: (){
              controls.play("2");

            })

I use name key 1 and 2 to change animation.
On flare editor all is good when I switch keys

but when I transfert in my device I have trouble with animation who loose origin, or shape who disappears.

here is my flutter version

flutter doctor
Doctor summary (to see all details, run flutter doctor -v):
[√] Flutter (Channel stable, v1.5.4-hotfix.2, on Microsoft Windows [version 10.0.17134.829], locale fr-FR)
[√] Android toolchain - develop for Android devices (Android SDK version 28.0.3)
[√] Android Studio (version 3.3)
[!] VS Code, 64-bit edition (version 1.21.1)
X Flutter extension not installed; install from
https://marketplace.visualstudio.com/items?itemName=Dart-Code.flutter
[√] Connected device (1 available)

! Doctor found issues in 1 category.