插件更新之后有BUG

[xnbmy]

Is there an existing issue for this?

• [X] I have searched the existing issues

Enter the name of the extension

Flash and transition painter

Describe the bug of the extension

新版本返回场景后之前画的遮罩不会消失，老版本就没这个问题。

Steps to reproduce

绘制好遮罩之后，暂停跳转到下一个场景，再返回就会发现遮罩不会消失

GDevelop platform

Desktop

GDevelop version

5.3.201

Platform info

OS (e.g. Windows, Linux, macOS, Android, iOS)

OS Version (e.g. Windows 10, macOS 10.15)

Browser(For Web) (e.g. Chrome, Firefox, Safari)

Device(For Mobile) (e.g. iPhone 12, Samsung Galaxy S21)

Additional context

No response