diff --git a/applets/notifications/package/contents/ui/JobDetails.qml b/applets/notifications/package/contents/ui/JobDetails.qml
--- a/applets/notifications/package/contents/ui/JobDetails.qml
+++ b/applets/notifications/package/contents/ui/JobDetails.qml
@@ -65,9 +65,17 @@
             elide: Text.ElideMiddle
             textFormat: Text.PlainText
             wrapMode: Text.WrapAtWordBoundaryOrAnywhere
+            verticalAlignment: Text.AlignTop
             maximumLineCount: 5
             visible: text !== ""
 
+            // Only let the label grow, never shrink, to avoid repeatedly resizing the dialog when copying many files
+            onImplicitHeightChanged: {
+                if (implicitHeight > Layout.preferredHeight) {
+                    Layout.preferredHeight = implicitHeight;
+                }
+            }
+
             Component.onCompleted: bindText()
             function bindText() {
                 text = Qt.binding(function() {