diff --git a/plugin/kquickstyleitem.cpp b/plugin/kquickstyleitem.cpp
--- a/plugin/kquickstyleitem.cpp
+++ b/plugin/kquickstyleitem.cpp
@@ -89,7 +89,10 @@
     m_textureHeight(0),
     m_lastFocusReason(Qt::NoFocusReason)
 {
-    if (!qApp->style()) {
+    // There is no styleChanged signal and QApplication sends QEvent::StyleChange only to all QWidgets
+    if (qApp->style()) {
+        connect(qApp->style(), &QObject::destroyed, this, &KQuickStyleItem::styleChanged);
+    } else {
         KSharedConfig::Ptr kdeglobals = KSharedConfig::openConfig();
         KConfigGroup cg(kdeglobals, "KDE");
         auto style = s_style;
@@ -1686,9 +1689,6 @@
             polish();
         }
         return true;
-    } else if (ev->type() == QEvent::StyleChange) {
-        if (m_itemType == ScrollBar)
-            initStyleOption();
     }
     return QQuickItem::event(ev);
 }
@@ -1818,6 +1818,20 @@
     return QQuickItem::eventFilter(watched, event);
 }
 
+void KQuickStyleItem::styleChanged()
+{
+    Q_ASSERT(qApp->style() != sender());
+
+    if (!qApp->style() || QApplication::closingDown()) {
+        return;
+    }
+
+    connect(qApp->style(), &QObject::destroyed, this, &KQuickStyleItem::styleChanged);
+
+    updateSizeHint();
+    updateItem();
+}
+
 QPixmap QQuickTableRowImageProvider1::requestPixmap(const QString &id, QSize *size, const QSize &requestedSize)
 {
     Q_UNUSED (requestedSize);
diff --git a/plugin/kquickstyleitem_p.h b/plugin/kquickstyleitem_p.h
--- a/plugin/kquickstyleitem_p.h
+++ b/plugin/kquickstyleitem_p.h
@@ -83,7 +83,7 @@
     Q_PROPERTY( QString elementType READ elementType WRITE setElementType NOTIFY elementTypeChanged)
     Q_PROPERTY( QString text READ text WRITE setText NOTIFY textChanged)
     Q_PROPERTY( QString activeControl READ activeControl WRITE setActiveControl NOTIFY activeControlChanged)
-    Q_PROPERTY( QString styleName READ styleName NOTIFY styleChanged)
+    Q_PROPERTY( QString styleName READ styleName NOTIFY styleNameChanged)
     Q_PROPERTY( QVariantMap hints READ hints WRITE setHints NOTIFY hintChanged RESET resetHints)
     Q_PROPERTY( QVariantMap properties READ properties WRITE setProperties NOTIFY propertiesChanged)
     Q_PROPERTY( QFont font READ font NOTIFY fontChanged)
@@ -262,7 +262,7 @@
     void valueChanged();
     void activeControlChanged();
     void infoChanged();
-    void styleChanged();
+    void styleNameChanged();
     void paintMarginsChanged();
     void hintChanged();
     void propertiesChanged();
@@ -290,6 +290,7 @@
     const char* classNameForItem() const;
     QSize sizeFromContents(int width, int height);
     qreal baselineOffset();
+    void styleChanged();
 
 protected:
     Kirigami::PlatformTheme *m_theme = nullptr;