webview_flutter with notification appears in the background of the webview

Hello,

Sorry for my english. I don't know if I'm in the good place, sorry if it's not.
I have 3 pages and 1 notification system.

Page 1: home page leading to the "webview" => "page 2"
Page 2: display webview with "flutterWebviewPlugin" and if you click on the link "Create Notification" it generates a notification.
Page 3: display the notification page

If clicks on the notification from "page 2" the "onSelectNotification" function creates a "MaterialPageRoute", but the "page 3" ends behind "page 2".

If I click on the notification from the "page 1" This is good.

Thanks for help :)
My github : [https://github.com/baaaaaziiiiingaaaaa/flutterwebview](https://github.com/baaaaaziiiiingaaaaa/flutterwebview)

从链接的 flutterwebview 复现开始，跟踪从第 2 页的 webview 到第 3 页的 MaterialPageRoute 的通知选择。复现第 2 页的通知流程，并将其与第 1 页的正常工作流程进行比较；完成标准是第 3 页在前台打开，而不是位于 webview 后面。

由索引模型根据 Issue 内容生成。