Blurring doesn't work if the html editor is on the screen

[BunnyBuddy]

Describe the bug
If I want to show the user some kind of popup on screen and the html editor is in the background, the blurring doesn't obscure the html editor. It's a weird behaviour that I never really understood. For further clarification, I've attached an image.

Is there a way to make it work?

The code I am using to show the popup looks like,

showDialog(
        context: context,
        barrierColor: const Color.fromRGBO(0, 0, 0, 0.2),
        barrierDismissible: true,
        builder: (BuildContext context) {
          return BackdropFilter(
            filter: ImageFilter.blur(sigmaX: 3.5.w, sigmaY: 3.5.h),
            child: Container(
              width: Get.width,
              height: Get.height,
              padding: MediaQuery.of(context).viewInsets,
              child: Column(
 ...

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[✓] Connected device (4 available)
    • iPhone (mobile) • 00008020           • ios            • iOS 17.6.1 21G93
    • iPhone 15 Pro Max (mobile)      • EEC16AC1-CAD4-AFE8 • ios            
    • com.apple.CoreSimulator.SimRuntime.iOS-17-4 (simulator)
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• No issues found!