diff --git a/src/FluFrameless.cpp b/src/FluFrameless.cpp
index 1b6ce37b..afe5d022 100644
--- a/src/FluFrameless.cpp
+++ b/src/FluFrameless.cpp
@@ -162,8 +162,8 @@ void FluFrameless::componentComplete() {
         }
         return false;
     } else if (uMsg == WM_NCCALCSIZE) {
-        const auto clientRect = ((wParam == FALSE) ? reinterpret_cast<LPRECT>(lParam) : &(reinterpret_cast<LPNCCALCSIZE_PARAMS>(lParam))->rgrc[0]);
         bool isMaximum = ::IsZoomed(hwnd);
+        const auto clientRect = ((wParam == FALSE) ? reinterpret_cast<LPRECT>(lParam) : &(reinterpret_cast<LPNCCALCSIZE_PARAMS>(lParam))->rgrc[0]);
         const LONG originalTop = clientRect->top;
         const LONG originalLeft = clientRect->left;
         const LONG originalBottom = clientRect->bottom;
@@ -186,6 +186,9 @@ void FluFrameless::componentComplete() {
             clientRect->bottom = originalBottom - offsetXY;
             clientRect->left = originalLeft + offsetXY;
             clientRect->right = originalRight - offsetXY;
+#if (QT_VERSION == QT_VERSION_CHECK(6, 5, 3) || QT_VERSION == QT_VERSION_CHECK(6, 6, 0))
+            qWarning("This issue is Qt's own bug, which currently only exists in 6.5.3 and 6.6.0, and has been fixed in later versions");
+#endif
         }
         _setMaximizeHovered(false);
         *result = WVR_REDRAW;
diff --git a/src/Qt5/imports/FluentUI/Controls/FluWindow.qml b/src/Qt5/imports/FluentUI/Controls/FluWindow.qml
index 9457a11a..941bb1b1 100644
--- a/src/Qt5/imports/FluentUI/Controls/FluWindow.qml
+++ b/src/Qt5/imports/FluentUI/Controls/FluWindow.qml
@@ -61,8 +61,8 @@ Window {
     property var _windowRegister
     property string _route
     property bool _hideShadow: false
-    id:window
-    color:"transparent"
+    id: window
+    color: FluTools.isSoftware() ? window.backgroundColor : "transparent"
     Component.onCompleted: {
         FluRouter.addWindow(window)
         useSystemAppBar = FluApp.useSystemAppBar
diff --git a/src/Qt6/imports/FluentUI/Controls/FluWindow.qml b/src/Qt6/imports/FluentUI/Controls/FluWindow.qml
index b214e98c..0973a266 100644
--- a/src/Qt6/imports/FluentUI/Controls/FluWindow.qml
+++ b/src/Qt6/imports/FluentUI/Controls/FluWindow.qml
@@ -60,8 +60,8 @@ Window {
     property var _windowRegister
     property string _route
     property bool _hideShadow: false
-    id:window
-    color:"transparent"
+    id: window
+    color: FluTools.isSoftware() ? window.backgroundColor : "transparent"
     Component.onCompleted: {
         FluRouter.addWindow(window)
         useSystemAppBar = FluApp.useSystemAppBar