diff --git a/Source/Core/DolphinWX/Frame.cpp b/Source/Core/DolphinWX/Frame.cpp
index 5978dfc49d..a07586ad9c 100644
--- a/Source/Core/DolphinWX/Frame.cpp
+++ b/Source/Core/DolphinWX/Frame.cpp
@@ -504,18 +504,25 @@ void CFrame::OnQuit(wxCommandEvent& WXUNUSED(event))
 // Events
 void CFrame::OnActive(wxActivateEvent& event)
 {
+  m_bRendererHasFocus = (event.GetActive() && event.GetEventObject() == m_RenderFrame);
   if (Core::GetState() == Core::CORE_RUN || Core::GetState() == Core::CORE_PAUSE)
   {
-    if (event.GetActive() && event.GetEventObject() == m_RenderFrame)
+    if (m_bRendererHasFocus)
     {
       if (SConfig::GetInstance().bRenderToMain)
         m_RenderParent->SetFocus();
 
+      if (SConfig::GetInstance().m_PauseOnFocusLost && Core::GetState() == Core::CORE_PAUSE)
+        DoPause();
+
       if (SConfig::GetInstance().bHideCursor && Core::GetState() == Core::CORE_RUN)
         m_RenderParent->SetCursor(wxCURSOR_BLANK);
     }
     else
     {
+      if (SConfig::GetInstance().m_PauseOnFocusLost && Core::GetState() == Core::CORE_RUN)
+        DoPause();
+
       if (SConfig::GetInstance().bHideCursor)
         m_RenderParent->SetCursor(wxNullCursor);
     }
@@ -769,38 +776,7 @@ bool CFrame::RendererHasFocus()
 {
   if (m_RenderParent == nullptr)
     return false;
-#ifdef _WIN32
-  HWND window = GetForegroundWindow();
-  if (window == nullptr)
-    return false;
-
-  if (m_RenderFrame->GetHWND() == window)
-    return true;
-#else
-  wxWindow* window = wxWindow::FindFocus();
-  if (window == nullptr)
-    return false;
-  // Why these different cases?
-  if (m_RenderParent == window || m_RenderParent == window->GetParent() ||
-      m_RenderParent->GetParent() == window->GetParent())
-  {
-    return true;
-  }
-#endif
-  return false;
-}
-
-bool CFrame::UIHasFocus()
-{
-  // UIHasFocus should return true any time any one of our UI
-  // windows has the focus, including any dialogs or other windows.
-  //
-  // wxWindow::FindFocus() returns the current wxWindow which has
-  // focus. If it's not one of our windows, then it will return
-  // null.
-
-  wxWindow* focusWindow = wxWindow::FindFocus();
-  return (focusWindow != nullptr);
+  return m_bRendererHasFocus;
 }
 
 void CFrame::OnGameListCtrlItemActivated(wxListEvent& WXUNUSED(event))
@@ -1139,35 +1115,6 @@ void CFrame::OnMouse(wxMouseEvent& event)
   event.Skip();
 }
 
-void CFrame::OnFocusChange(wxFocusEvent& event)
-{
-  if (SConfig::GetInstance().m_PauseOnFocusLost && Core::IsRunningAndStarted())
-  {
-    if (RendererHasFocus())
-    {
-      if (Core::GetState() == Core::CORE_PAUSE)
-      {
-        Core::SetState(Core::CORE_RUN);
-        if (SConfig::GetInstance().bHideCursor)
-          m_RenderParent->SetCursor(wxCURSOR_BLANK);
-      }
-    }
-    else
-    {
-      if (Core::GetState() == Core::CORE_RUN)
-      {
-        Core::SetState(Core::CORE_PAUSE);
-        if (SConfig::GetInstance().bHideCursor)
-          m_RenderParent->SetCursor(wxNullCursor);
-        Core::UpdateTitle();
-      }
-    }
-    UpdateGUI();
-  }
-
-  event.Skip();
-}
-
 void CFrame::DoFullscreen(bool enable_fullscreen)
 {
   if (g_Config.bExclusiveMode && Core::GetState() == Core::CORE_PAUSE)
diff --git a/Source/Core/DolphinWX/Frame.h b/Source/Core/DolphinWX/Frame.h
index 883b2db9f4..99358f4de3 100644
--- a/Source/Core/DolphinWX/Frame.h
+++ b/Source/Core/DolphinWX/Frame.h
@@ -101,7 +101,6 @@ public:
   void OnRenderParentClose(wxCloseEvent& event);
   void OnRenderParentMove(wxMoveEvent& event);
   bool RendererHasFocus();
-  bool UIHasFocus();
   bool RendererIsFullscreen();
   void DoFullscreen(bool bF);
   void ToggleDisplayMode(bool bFullscreen);
@@ -158,6 +157,7 @@ private:
   bool m_bNoDocking = false;
   bool m_bGameLoading = false;
   bool m_bClosing = false;
+  bool m_bRendererHasFocus = false;
   bool m_confirmStop = false;
   bool m_tried_graceful_shutdown = false;
   int m_saveSlot = 1;
@@ -306,8 +306,6 @@ private:
   void OnKeyDown(wxKeyEvent& event);  // Keyboard
   void OnMouse(wxMouseEvent& event);  // Mouse
 
-  void OnFocusChange(wxFocusEvent& event);
-
   void OnHostMessage(wxCommandEvent& event);
 
   void OnMemcard(wxCommandEvent& event);  // Misc
diff --git a/Source/Core/DolphinWX/FrameTools.cpp b/Source/Core/DolphinWX/FrameTools.cpp
index 7380583fe9..69ab9fcb63 100644
--- a/Source/Core/DolphinWX/FrameTools.cpp
+++ b/Source/Core/DolphinWX/FrameTools.cpp
@@ -735,8 +735,6 @@ void CFrame::StartGame(const std::string& filename)
     wxTheApp->Bind(wxEVT_MIDDLE_DOWN, &CFrame::OnMouse, this);
     wxTheApp->Bind(wxEVT_MIDDLE_UP, &CFrame::OnMouse, this);
     wxTheApp->Bind(wxEVT_MOTION, &CFrame::OnMouse, this);
-    wxTheApp->Bind(wxEVT_SET_FOCUS, &CFrame::OnFocusChange, this);
-    wxTheApp->Bind(wxEVT_KILL_FOCUS, &CFrame::OnFocusChange, this);
     m_RenderParent->Bind(wxEVT_SIZE, &CFrame::OnRenderParentResize, this);
   }
 }
@@ -928,6 +926,8 @@ void CFrame::OnStopped()
     m_RenderFrame->SetWindowStyle(m_RenderFrame->GetWindowStyle() & ~wxSTAY_ON_TOP);
   }
   m_RenderParent = nullptr;
+  m_bRendererHasFocus = false;
+  m_RenderFrame = nullptr;
 
   // Clean framerate indications from the status bar.
   GetStatusBar()->SetStatusText(" ", 0);
diff --git a/Source/Core/DolphinWX/Main.cpp b/Source/Core/DolphinWX/Main.cpp
index bdf6ada482..6620275cfa 100644
--- a/Source/Core/DolphinWX/Main.cpp
+++ b/Source/Core/DolphinWX/Main.cpp
@@ -84,6 +84,7 @@ bool DolphinApp::OnInit()
   Bind(wxEVT_QUERY_END_SESSION, &DolphinApp::OnEndSession, this);
   Bind(wxEVT_END_SESSION, &DolphinApp::OnEndSession, this);
   Bind(wxEVT_IDLE, &DolphinApp::OnIdle, this);
+  Bind(wxEVT_ACTIVATE_APP, &DolphinApp::OnActivate, this);
 
   // Register message box and translation handlers
   RegisterMsgAlertHandler(&wxMsgAlert);
@@ -256,6 +257,11 @@ void DolphinApp::AfterInit()
   }
 }
 
+void DolphinApp::OnActivate(wxActivateEvent& ev)
+{
+  m_is_active = ev.GetActive();
+}
+
 void DolphinApp::InitLanguageSupport()
 {
   std::string language_code;
@@ -500,7 +506,7 @@ void Host_SetWiiMoteConnectionState(int _State)
 
 bool Host_UIHasFocus()
 {
-  return main_frame->UIHasFocus();
+  return wxGetApp().IsActiveThreadsafe();
 }
 
 bool Host_RendererHasFocus()
diff --git a/Source/Core/DolphinWX/Main.h b/Source/Core/DolphinWX/Main.h
index 803ee3baa9..e1bfd8df25 100644
--- a/Source/Core/DolphinWX/Main.h
+++ b/Source/Core/DolphinWX/Main.h
@@ -16,6 +16,7 @@ extern CFrame* main_frame;
 class DolphinApp : public wxApp
 {
 public:
+  bool IsActiveThreadsafe() const { return m_is_active; }
   CFrame* GetCFrame();
 
 private:
@@ -33,10 +34,12 @@ private:
   void OnEndSession(wxCloseEvent& event);
   void InitLanguageSupport();
   void AfterInit();
+  void OnActivate(wxActivateEvent& ev);
   void OnIdle(wxIdleEvent&);
 
   bool m_batch_mode = false;
   bool m_confirm_stop = false;
+  bool m_is_active = true;
   bool m_load_file = false;
   bool m_play_movie = false;
   bool m_use_debugger = false;