Error showing messages inside an alertdialog

[SouMeiAPP]

Describe the bug
Executing a dialog and within this alertdialog press the execute button, the messages are staying between the parent widget and alertdialog

Flutter/Dart info
PS C:\easyl> flutter doctor
Doctor summary (to see all details, run flutter doctor -v):
[√] Flutter (Channel stable, 3.0.2, on Microsoft Windows [versÆo 6.1.7601], locale pt-BR)
[√] Android toolchain - develop for Android devices (Android SDK version 33.0.0-rc4)
[√] Chrome - develop for the web
[!] Visual Studio - develop for Windows (Visual Studio Community 2019 16.11.15)
X The current Visual Studio installation is incomplete. Please reinstall Visual Studio.
[√] Android Studio (version 2021.2)
[√] VS Code (version 1.62.2)
[√] VS Code, 64-bit edition (version 1.68.1)
[√] Connected device (3 available)
[√] HTTP Host Availability

! Doctor found issues in 1 category.

Screenshots
follow the source code with the error reproduction
easyl.zip