dont apply too early blur effect

dont delay the corona destruction under wayland
because that creates a crash with kwin effects

BUG: 392890

app/dock/dockview.cpp

@@ -1549,9 +1549,9 @@ void DockView::setBlockHiding(bool block)
 
 void DockView::updateEffects()
 {
-    //! CRASH: Dont update effects under wayland
-    //! because they arent supported yet
-    if (KWindowSystem::isPlatformWayland()) {
+    //! Dont apply any effect before the wayland surface is created under wayland
+    //! https://bugs.kde.org/show_bug.cgi?id=392890
+    if (KWindowSystem::isPlatformWayland() && !m_shellSurface) {
         return;
     }
 

app/dockcorona.cpp

@@ -133,12 +133,17 @@ DockCorona::~DockCorona()
     //! BEGIN: Give the time to slide-out docks when closing
     m_layoutManager->hideAllDocks();
 
-    QTimer::singleShot(400, [this]() {
-        m_quitTimedEnded = true;
-    });
+    //! Dont delay the destruction under wayland in any case
+    //! because it creates a crash with kwin effects
+    //! https://bugs.kde.org/show_bug.cgi?id=392890
+    if (!KWindowSystem::isPlatformWayland()) {
+        QTimer::singleShot(400, [this]() {
+            m_quitTimedEnded = true;
+        });
 
-    while (!m_quitTimedEnded) {
-        QGuiApplication::processEvents(QEventLoop::AllEvents, 50);
+        while (!m_quitTimedEnded) {
+            QGuiApplication::processEvents(QEventLoop::AllEvents, 50);
+        }
     }
 
     //! END: slide-out docks when closing