diff --git a/src/kcollapsiblegroupbox.cpp b/src/kcollapsiblegroupbox.cpp
--- a/src/kcollapsiblegroupbox.cpp
+++ b/src/kcollapsiblegroupbox.cpp
@@ -20,6 +20,7 @@
 
 #include "kcollapsiblegroupbox.h"
 
+#include <QLabel>
 #include <QLayout>
 #include <QStyle>
 #include <QPainter>
@@ -297,6 +298,17 @@
 
 void KCollapsibleGroupBox::overrideFocusPolicyOf(QWidget *widget)
 {
+    // https://bugs.kde.org/show_bug.cgi?id=396450
+    // A label with word-wrapping enabled will break positioning of the groupbox in the layout.
+    // The cause seems to be the setFocusPolicy() call below, but it's not clear why.
+    // Until a proper fix is found, as workaround we toggle twice the groupbox which fixes the issue.
+    if (auto label = qobject_cast<QLabel*>(widget)) {
+        if (label->wordWrap()) {
+            toggle();
+            toggle();
+        }
+    }
+
     d->focusMap.insert(widget, widget->focusPolicy());
 
     if (!isExpanded()) {
diff --git a/tests/kcollapsiblegroupboxtest.cpp b/tests/kcollapsiblegroupboxtest.cpp
--- a/tests/kcollapsiblegroupboxtest.cpp
+++ b/tests/kcollapsiblegroupboxtest.cpp
@@ -52,6 +52,12 @@
         auto checkBox = new QCheckBox(QStringLiteral("Some really long text that goes on and on and on for ever and ever"));
         innerLayout->addWidget(checkBox);
 
+        auto label = new QLabel(groupBox);
+        label->setText(QStringLiteral("Some input field:"));
+        // Word-wrapping in labels triggers a bug in the layout positioning.
+        label->setWordWrap(true);
+        innerLayout->addWidget(label);
+
         auto lineEdit = new QLineEdit(groupBox);
         innerLayout->addWidget(lineEdit);