diff --git a/src/declarativeimports/core/tooltip.cpp b/src/declarativeimports/core/tooltip.cpp
--- a/src/declarativeimports/core/tooltip.cpp
+++ b/src/declarativeimports/core/tooltip.cpp
@@ -157,7 +157,7 @@
     dlg->setVisualParent(this);
     dlg->setMainItem(mainItem());
     dlg->setInteractive(m_interactive);
-    dlg->show();
+    dlg->setVisible(true);
 }
 
 QString ToolTip::mainText() const
diff --git a/src/plasmaquick/dialog.h b/src/plasmaquick/dialog.h
--- a/src/plasmaquick/dialog.h
+++ b/src/plasmaquick/dialog.h
@@ -197,6 +197,9 @@
     void setBackgroundHints(BackgroundHints hints);
 
     bool isVisible() const;
+    /**
+     * Note: in order for aboutToShow to be correctly emitted, this needs to be used instead of show()
+     */
     void setVisible(bool visible);
 
     /**
@@ -221,6 +224,11 @@
      * window that is neither a parent dialog to nor a child dialog of this dialog.
      */
     void windowDeactivated();
+    /**
+     * Emitted when the popup is about to show
+     * it's still not visible, but geometry already adjusted
+     */
+    void aboutToShow();
 
 protected:
     /**
diff --git a/src/plasmaquick/dialog.cpp b/src/plasmaquick/dialog.cpp
--- a/src/plasmaquick/dialog.cpp
+++ b/src/plasmaquick/dialog.cpp
@@ -298,11 +298,10 @@
                 cachedGeometry = QRect();
             }
 
-            if (mainItem) {
-                syncToMainItemSize();
-            }
-            if (mainItemLayout) {
-                updateLayoutParameters();
+            //if is a wayland window that was hidden, we need
+            //to set its position again as there won't be any move event to sync QWindow::position and shellsurface::position
+            if (shellSurface) {
+                shellSurface->setPosition(q->position());
             }
         }
     }
@@ -447,7 +446,7 @@
 
 void DialogPrivate::getSizeHints(QSize &min, QSize &max) const
 {
-    if (!componentComplete || !mainItem || !q->isVisible() || !mainItemLayout) {
+    if (!componentComplete || !mainItem || !mainItemLayout) {
         return;
     }
     Q_ASSERT(mainItem);
@@ -481,7 +480,7 @@
 
 void DialogPrivate::updateLayoutParameters()
 {
-    if (!componentComplete || !mainItem || !q->isVisible() || !mainItemLayout) {
+    if (!componentComplete || !mainItem || !mainItemLayout) {
         return;
     }
 
@@ -598,7 +597,7 @@
 {
     Q_ASSERT(mainItem);
 
-    if (!componentComplete || !q->isVisible()) {
+    if (!componentComplete) {
         return;
     }
     if (mainItem->width() <= 0 || mainItem->height() <= 0) {
@@ -1164,10 +1163,13 @@
          * see https://phabricator.kde.org/T6064
          */
 #if HAVE_KWAYLAND
-        if (!d->shellSurface) {
+        //sometimes non null regions arrive even for non visible windows
+        //for which surface creation would fail
+        if (!d->shellSurface && isVisible()) {
             KWindowSystem::setState(winId(), NET::SkipTaskbar | NET::SkipPager);
             d->setupWaylandIntegration();
             d->updateVisibility(true);
+            d->updateTheme();
         }
 #endif
 #if (QT_VERSION > QT_VERSION_CHECK(5, 5, 0))
@@ -1304,21 +1306,24 @@
 void Dialog::componentComplete()
 {
     d->componentComplete = true;
+    if (d->visible) {
+        if (d->mainItem) {
+            d->mainItem->setVisible(true);
+            d->syncToMainItemSize();
+        }
+
+        if (d->mainItemLayout) {
+            d->updateLayoutParameters();
+        }
+        emit aboutToShow();
+    }
     QQuickWindow::setVisible(d->visible);
     if (d->visible) {
         // FIXME TODO: We can remove this once we depend on Qt 5.6.1+.
         // See: https://bugreports.qt.io/browse/QTBUG-26978
         KWindowSystem::setState(winId(), NET::SkipTaskbar | NET::SkipPager);
     }
     d->updateTheme();
-
-    if (d->mainItem) {
-        d->syncToMainItemSize();
-    }
-
-    if (d->mainItemLayout) {
-        d->updateLayoutParameters();
-    }
 }
 
 bool Dialog::hideOnWindowDeactivate() const
@@ -1356,6 +1361,17 @@
 
     d->visible = visible;
     if (d->componentComplete) {
+        if (visible) {
+            if (d->mainItem) {
+                d->mainItem->setVisible(true);
+                d->syncToMainItemSize();
+            }
+            if (d->mainItemLayout) {
+                d->updateLayoutParameters();
+            }
+
+            emit aboutToShow();
+        }
         if (visible && d->visualParent) {
             setPosition(popupPosition(d->visualParent, size()));
         }