Fix release builds

app/streaming/session.cpp

@@ -784,7 +784,7 @@ void Session::exec()
     // Capture the mouse by default on release builds only.
     // This prevents the mouse from becoming trapped inside
     // Moonlight when it's halted at a debug break.
-    if (m_Preferences.fullScreen) {
+    if (m_Preferences.windowMode != StreamingPreferences::WM_WINDOWED) {
         SDL_SetRelativeMouseMode(SDL_TRUE);
     }
 #endif