diff --git a/src/input.cpp b/src/input.cpp
index 9ee2faaf6a..ee7cc3223c 100644
--- a/src/input.cpp
+++ b/src/input.cpp
@@ -1195,6 +1195,10 @@ class InternalWindowEventFilter : public InputEventFilter
             return false;
         }
         QWindow *internal = static_cast<InternalWindow *>(input()->pointer()->focus())->handle();
+        if (!internal) {
+            // the handle can be nullptr if the tooltip gets closed while focus updates are blocked
+            return false;
+        }
         QMouseEvent mouseEvent(event->type(),
                                event->pos() - internal->position(),
                                event->globalPosition(),