diff --git a/src/statusbar/spaceinfoobserver.h b/src/statusbar/spaceinfoobserver.h
--- a/src/statusbar/spaceinfoobserver.h
+++ b/src/statusbar/spaceinfoobserver.h
@@ -55,6 +55,7 @@
 private:
     MountPointObserver* m_mountPointObserver;
 
+    bool    m_hasData;
     quint64 m_dataSize;
     quint64 m_dataAvailable;
 };
diff --git a/src/statusbar/spaceinfoobserver.cpp b/src/statusbar/spaceinfoobserver.cpp
--- a/src/statusbar/spaceinfoobserver.cpp
+++ b/src/statusbar/spaceinfoobserver.cpp
@@ -24,6 +24,7 @@
 SpaceInfoObserver::SpaceInfoObserver(const QUrl& url, QObject* parent) :
     QObject(parent),
     m_mountPointObserver(nullptr),
+    m_hasData(false),
     m_dataSize(0),
     m_dataAvailable(0)
 {
@@ -81,7 +82,8 @@
 void SpaceInfoObserver::spaceInfoChanged(quint64 size, quint64 available)
 {
     // Make sure that the size has actually changed
-    if (m_dataSize != size || m_dataAvailable != available) {
+    if (m_dataSize != size || m_dataAvailable != available || !m_hasData) {
+        m_hasData = true;
         m_dataSize = size;
         m_dataAvailable = available;
 
diff --git a/src/statusbar/statusbarspaceinfo.cpp b/src/statusbar/statusbarspaceinfo.cpp
--- a/src/statusbar/statusbarspaceinfo.cpp
+++ b/src/statusbar/statusbarspaceinfo.cpp
@@ -43,7 +43,8 @@
     if (m_url != url) {
         m_url = url;
         if (m_observer) {
-            m_observer->setUrl(url);
+            m_observer.reset(new SpaceInfoObserver(m_url, this));
+            connect(m_observer.data(), &SpaceInfoObserver::valuesChanged, this, &StatusBarSpaceInfo::slotValuesChanged);
         }
     }
 }
@@ -63,9 +64,10 @@
 void StatusBarSpaceInfo::showEvent(QShowEvent* event)
 {
     KCapacityBar::showEvent(event);
-    m_observer.reset(new SpaceInfoObserver(m_url, this));
-    slotValuesChanged();
-    connect(m_observer.data(), &SpaceInfoObserver::valuesChanged, this, &StatusBarSpaceInfo::slotValuesChanged);
+    if (m_observer.isNull()) {
+        m_observer.reset(new SpaceInfoObserver(m_url, this));
+        connect(m_observer.data(), &SpaceInfoObserver::valuesChanged, this, &StatusBarSpaceInfo::slotValuesChanged);
+    }
 }
 
 void StatusBarSpaceInfo::hideEvent(QHideEvent* event)
@@ -96,9 +98,7 @@
     Q_ASSERT(m_observer);
     const quint64 size = m_observer->size();
     if (size == 0) {
-        setText(i18nc("@info:status", "Unknown size"));
-        setValue(0);
-        update();
+        hide();
     } else {
         const quint64 available = m_observer->available();
         const quint64 used = size - available;