diff --git a/src/qt/qt_mainwindow.cpp b/src/qt/qt_mainwindow.cpp
index e0252dd7a..eb4634dee 100644
--- a/src/qt/qt_mainwindow.cpp
+++ b/src/qt/qt_mainwindow.cpp
@@ -808,6 +808,14 @@ MainWindow::initRendererMonitorSlot(int monitor_index)
             }
             secondaryRenderer->switchRenderer((RendererStack::Renderer) vid_api);
             secondaryRenderer->setMouseTracking(true);
+
+            if (monitor_settings[monitor_index].mon_window_maximized) {
+                if (renderers[monitor_index])
+                    renderers[monitor_index]->onResize(renderers[monitor_index]->width(),
+                    renderers[monitor_index]->height());
+
+                device_force_redraw();
+            }
         }
     }
 }
@@ -1379,12 +1387,12 @@ MainWindow::on_actionResizable_window_triggered(bool checked)
 {
     if (checked) {
         vid_resize = 1;
-        setWindowFlag(Qt::WindowMaximizeButtonHint);
+        setWindowFlag(Qt::WindowMaximizeButtonHint, true);
         setWindowFlag(Qt::MSWindowsFixedSizeDialogHint, false);
         setFixedSize(QWIDGETSIZE_MAX, QWIDGETSIZE_MAX);
         for (int i = 1; i < MONITORS_NUM; i++) {
             if (monitors[i].target_buffer) {
-                renderers[i]->setWindowFlag(Qt::WindowMaximizeButtonHint);
+                renderers[i]->setWindowFlag(Qt::WindowMaximizeButtonHint, true);
                 renderers[i]->setFixedSize(QWIDGETSIZE_MAX, QWIDGETSIZE_MAX);
             }
         }