diff --git a/src/plugins/platforms/wayland/plugins/shellintegration/xdg-shell-v5/qwaylandxdgsurfacev5.cpp b/src/plugins/platforms/wayland/plugins/shellintegration/xdg-shell-v5/qwaylandxdgsurfacev5.cpp
index 31c7dff7b96..40e2a994daa 100644
--- a/src/plugins/platforms/wayland/plugins/shellintegration/xdg-shell-v5/qwaylandxdgsurfacev5.cpp
+++ b/src/plugins/platforms/wayland/plugins/shellintegration/xdg-shell-v5/qwaylandxdgsurfacev5.cpp
@@ -229,6 +229,7 @@ void QWaylandXdgSurfaceV5::xdg_surface_configure(int32_t width, int32_t height,
 
 void QWaylandXdgSurfaceV5::xdg_surface_close()
 {
+    m_window->window()->close();
 }
 
 }
diff --git a/src/plugins/platforms/wayland/plugins/shellintegration/xdg-shell-v6/qwaylandxdgshellv6.cpp b/src/plugins/platforms/wayland/plugins/shellintegration/xdg-shell-v6/qwaylandxdgshellv6.cpp
index a8bfaac690a..986deceb19a 100644
--- a/src/plugins/platforms/wayland/plugins/shellintegration/xdg-shell-v6/qwaylandxdgshellv6.cpp
+++ b/src/plugins/platforms/wayland/plugins/shellintegration/xdg-shell-v6/qwaylandxdgshellv6.cpp
@@ -152,6 +152,7 @@ QWaylandXdgSurfaceV6::Popup::Popup(QWaylandXdgSurfaceV6 *xdgSurface, QWaylandXdg
                                    QtWayland::zxdg_positioner_v6 *positioner)
     : zxdg_popup_v6(xdgSurface->get_popup(parent->object(), positioner->object()))
     , m_xdgSurface(xdgSurface)
+    , m_parent(parent)
 {
 }
 
@@ -159,6 +160,19 @@ QWaylandXdgSurfaceV6::Popup::~Popup()
 {
     if (isInitialized())
         destroy();
+
+    if (m_grabbing) {
+        auto *shell = m_xdgSurface->m_shell;
+        Q_ASSERT(shell->m_topmostPopup == this);
+        shell->m_topmostPopup = m_parent->m_popup;
+    }
+}
+
+void QWaylandXdgSurfaceV6::Popup::grab(QWaylandInputDevice *seat, uint serial)
+{
+    m_xdgSurface->m_shell->m_topmostPopup = this;
+    zxdg_popup_v6::grab(seat->wl_seat(), serial);
+    m_grabbing = true;
 }
 
 void QWaylandXdgSurfaceV6::Popup::zxdg_popup_v6_popup_done()
@@ -192,8 +206,10 @@ QWaylandXdgSurfaceV6::~QWaylandXdgSurfaceV6()
 {
     if (m_toplevel)
         zxdg_toplevel_v6_destroy(m_toplevel->object());
-    if (m_popup)
-        zxdg_popup_v6_destroy(m_popup->object());
+    if (m_popup) {
+        delete m_popup;
+        m_popup = nullptr;
+    }
     destroy();
 }
 
@@ -277,6 +293,14 @@ void QWaylandXdgSurfaceV6::setPopup(QWaylandWindow *parent, QWaylandInputDevice
     Q_ASSERT(!m_toplevel && !m_popup);
 
     auto parentXdgSurface = static_cast<QWaylandXdgSurfaceV6 *>(parent->shellSurface());
+
+    auto *top = m_shell->m_topmostPopup;
+    if (grab && top && top->m_xdgSurface != parentXdgSurface) {
+        qCWarning(lcQpaWayland) << "setPopup called for a surface that was not the topmost popup, positions might be off.";
+        parentXdgSurface = top->m_xdgSurface;
+        parent = top->m_xdgSurface->m_window;
+    }
+
     auto positioner = new QtWayland::zxdg_positioner_v6(m_shell->create_positioner());
     // set_popup expects a position relative to the parent
     QPoint transientPos = m_window->geometry().topLeft(); // this is absolute
@@ -292,9 +316,8 @@ void QWaylandXdgSurfaceV6::setPopup(QWaylandWindow *parent, QWaylandInputDevice
     m_popup = new Popup(this, parentXdgSurface, positioner);
     positioner->destroy();
     delete positioner;
-    if (grab) {
-        m_popup->grab(device->wl_seat(), serial);
-    }
+    if (grab)
+        m_popup->grab(device, serial);
 }
 
 void QWaylandXdgSurfaceV6::zxdg_surface_v6_configure(uint32_t serial)
diff --git a/src/plugins/platforms/wayland/plugins/shellintegration/xdg-shell-v6/qwaylandxdgshellv6_p.h b/src/plugins/platforms/wayland/plugins/shellintegration/xdg-shell-v6/qwaylandxdgshellv6_p.h
index 8168ae5650a..38b711f88d2 100644
--- a/src/plugins/platforms/wayland/plugins/shellintegration/xdg-shell-v6/qwaylandxdgshellv6_p.h
+++ b/src/plugins/platforms/wayland/plugins/shellintegration/xdg-shell-v6/qwaylandxdgshellv6_p.h
@@ -122,9 +122,12 @@ private:
         Popup(QWaylandXdgSurfaceV6 *xdgSurface, QWaylandXdgSurfaceV6 *parent, QtWayland::zxdg_positioner_v6 *positioner);
         ~Popup() override;
 
+        void grab(QWaylandInputDevice *seat, uint serial);
         void zxdg_popup_v6_popup_done() override;
 
         QWaylandXdgSurfaceV6 *m_xdgSurface = nullptr;
+        QWaylandXdgSurfaceV6 *m_parent = nullptr;
+        bool m_grabbing = false;
     };
 
     void setToplevel();
@@ -137,6 +140,8 @@ private:
     bool m_configured = false;
     QRegion m_exposeRegion;
     uint m_pendingConfigureSerial = 0;
+
+    friend class QWaylandXdgShellV6;
 };
 
 class Q_WAYLAND_CLIENT_EXPORT QWaylandXdgShellV6 : public QtWayland::zxdg_shell_v6
@@ -150,6 +155,9 @@ public:
 
 private:
     void zxdg_shell_v6_ping(uint32_t serial) override;
+    QWaylandXdgSurfaceV6::Popup *m_topmostPopup = nullptr;
+
+    friend class QWaylandXdgSurfaceV6;
 };
 
 QT_END_NAMESPACE
diff --git a/tests/auto/wayland/client/tst_client.cpp b/tests/auto/wayland/client/tst_client.cpp
index 6b7daecd5f1..470db25a4c7 100644
--- a/tests/auto/wayland/client/tst_client.cpp
+++ b/tests/auto/wayland/client/tst_client.cpp
@@ -506,6 +506,7 @@ void tst_WaylandClient::mouseDrag()
 
 void tst_WaylandClient::dontCrashOnMultipleCommits()
 {
+    QSKIP("This test is flaky. See QTBUG-68756.");
     auto window = new TestWindow();
     window->show();