diff --git a/Source/Core/Core/HW/WiimoteEmu/EmuSubroutines.cpp b/Source/Core/Core/HW/WiimoteEmu/EmuSubroutines.cpp
index 2c510fb394..67dee9216d 100644
--- a/Source/Core/Core/HW/WiimoteEmu/EmuSubroutines.cpp
+++ b/Source/Core/Core/HW/WiimoteEmu/EmuSubroutines.cpp
@@ -604,7 +604,7 @@ ExtensionNumber Wiimote::GetActiveExtensionNumber() const
 
 bool Wiimote::IsMotionPlusAttached() const
 {
-  return m_is_motion_plus_attached;
+  return m_motion_plus_setting.GetValue();
 }
 
 }  // namespace WiimoteEmu
diff --git a/Source/Core/DolphinQt/Config/Mapping/WiimoteEmuGeneral.cpp b/Source/Core/DolphinQt/Config/Mapping/WiimoteEmuGeneral.cpp
index 85512c8a2b..2317b06f25 100644
--- a/Source/Core/DolphinQt/Config/Mapping/WiimoteEmuGeneral.cpp
+++ b/Source/Core/DolphinQt/Config/Mapping/WiimoteEmuGeneral.cpp
@@ -15,6 +15,7 @@
 
 #include "DolphinQt/Config/Mapping/MappingWindow.h"
 #include "DolphinQt/Config/Mapping/WiimoteEmuExtension.h"
+#include "DolphinQt/Settings.h"
 
 #include "InputCommon/ControllerEmu/ControlGroup/Attachments.h"
 #include "InputCommon/InputConfig.h"
@@ -88,6 +89,8 @@ void WiimoteEmuGeneral::OnAttachmentChanged(int extension)
   GetParent()->ShowExtensionMotionTabs(extension == WiimoteEmu::ExtensionNumber::NUNCHUK);
 
   m_extension_widget->ChangeExtensionType(extension);
+
+  Settings::Instance().UpdateWiimoteExtension(GetPort(), extension);
 }
 
 void WiimoteEmuGeneral::OnAttachmentSelected(int extension)
@@ -110,6 +113,7 @@ void WiimoteEmuGeneral::ConfigChanged()
 
   m_extension_combo_dynamic_indicator->setVisible(
       !ce_extension->GetSelectionSetting().IsSimpleValue());
+  OnMotionPlusUpdate();
 }
 
 void WiimoteEmuGeneral::Update()
@@ -128,9 +132,18 @@ void WiimoteEmuGeneral::LoadSettings()
 void WiimoteEmuGeneral::SaveSettings()
 {
   Wiimote::GetConfig()->SaveConfig();
+  OnMotionPlusUpdate();
 }
 
 InputConfig* WiimoteEmuGeneral::GetConfig()
 {
   return Wiimote::GetConfig();
 }
+
+void WiimoteEmuGeneral::OnMotionPlusUpdate()
+{
+  const int port = GetPort();
+  const WiimoteEmu::Wiimote* const wiimote =
+      static_cast<WiimoteEmu::Wiimote*>(Wiimote::GetConfig()->GetController(port));
+  Settings::Instance().UpdateWiimoteMotionPlus(port, wiimote->IsMotionPlusAttached());
+}
diff --git a/Source/Core/DolphinQt/Config/Mapping/WiimoteEmuGeneral.h b/Source/Core/DolphinQt/Config/Mapping/WiimoteEmuGeneral.h
index b3bd5d06e1..4465810f54 100644
--- a/Source/Core/DolphinQt/Config/Mapping/WiimoteEmuGeneral.h
+++ b/Source/Core/DolphinQt/Config/Mapping/WiimoteEmuGeneral.h
@@ -27,6 +27,7 @@ private:
   void OnAttachmentChanged(int index);
   // Selection chosen by user.
   void OnAttachmentSelected(int index);
+  void OnMotionPlusUpdate();
 
   void ConfigChanged();
   void Update();
diff --git a/Source/Core/DolphinQt/MainWindow.cpp b/Source/Core/DolphinQt/MainWindow.cpp
index 93ad16a59e..606503e980 100644
--- a/Source/Core/DolphinQt/MainWindow.cpp
+++ b/Source/Core/DolphinQt/MainWindow.cpp
@@ -519,6 +519,15 @@ void MainWindow::CreateComponents()
           &MemoryWidget::SetAddress);
   connect(m_cheats_manager, &CheatsManager::ShowMemory, m_memory_widget, &MemoryWidget::SetAddress);
   connect(m_cheats_manager, &CheatsManager::RequestWatch, request_watch);
+
+  connect(&Settings::Instance(), &Settings::UpdateWiimoteExtension,
+          [this](const int controller_number, const int extension_index) {
+            m_wii_tas_input_windows[controller_number]->UpdateExtension(extension_index);
+          });
+  connect(&Settings::Instance(), &Settings::UpdateWiimoteMotionPlus,
+          [this](const int controller_number, const bool attached) {
+            m_wii_tas_input_windows[controller_number]->UpdateMotionPlus(attached);
+          });
 }
 
 void MainWindow::ConnectMenuBar()
diff --git a/Source/Core/DolphinQt/Settings.h b/Source/Core/DolphinQt/Settings.h
index ad7be608c3..2b2fdde182 100644
--- a/Source/Core/DolphinQt/Settings.h
+++ b/Source/Core/DolphinQt/Settings.h
@@ -224,6 +224,8 @@ signals:
   void USBKeyboardConnectionChanged(bool connected);
   void EnableGfxModsChanged(bool enabled);
   void HardcoreStateChanged();
+  void UpdateWiimoteExtension(int controller_number, int extension_index);
+  void UpdateWiimoteMotionPlus(int controller_number, bool attached);
 
 private:
   Settings();
diff --git a/Source/Core/DolphinQt/TAS/WiiTASInputWindow.cpp b/Source/Core/DolphinQt/TAS/WiiTASInputWindow.cpp
index b48b3d5040..c254a2057b 100644
--- a/Source/Core/DolphinQt/TAS/WiiTASInputWindow.cpp
+++ b/Source/Core/DolphinQt/TAS/WiiTASInputWindow.cpp
@@ -347,7 +347,6 @@ WiiTASInputWindow::WiiTASInputWindow(QWidget* parent, int num) : TASInputWindow(
   layout->addWidget(m_settings_box);
 
   setLayout(layout);
-  UpdateExt();
 }
 
 WiimoteEmu::Wiimote* WiiTASInputWindow::GetWiimote()
@@ -367,6 +366,28 @@ WiimoteEmu::Extension* WiiTASInputWindow::GetExtension()
       GetAttachments()->GetAttachmentList()[m_active_extension].get());
 }
 
+void WiiTASInputWindow::UpdateExtension(const int extension)
+{
+  const auto new_extension = static_cast<WiimoteEmu::ExtensionNumber>(extension);
+  if (new_extension == m_active_extension)
+    return;
+
+  m_active_extension = new_extension;
+
+  UpdateControlVisibility();
+  UpdateInputOverrideFunction();
+}
+
+void WiiTASInputWindow::UpdateMotionPlus(const bool attached)
+{
+  if (attached == m_is_motion_plus_attached)
+    return;
+
+  m_is_motion_plus_attached = attached;
+
+  UpdateControlVisibility();
+}
+
 void WiiTASInputWindow::LoadExtensionAndMotionPlus()
 {
   if (Core::IsRunning(Core::System::GetInstance()))
@@ -393,9 +414,12 @@ void WiiTASInputWindow::LoadExtensionAndMotionPlus()
     m_is_motion_plus_attached = true;
     ini.GetIfExists(section_name, "Extension/Attach MotionPlus", &m_is_motion_plus_attached);
   }
+
+  UpdateControlVisibility();
+  UpdateInputOverrideFunction();
 }
 
-void WiiTASInputWindow::UpdateExt()
+void WiiTASInputWindow::UpdateControlVisibility()
 {
   if (m_active_extension == WiimoteEmu::ExtensionNumber::NUNCHUK)
   {
@@ -454,17 +478,30 @@ void WiiTASInputWindow::UpdateExt()
     m_nunchuk_buttons_box->hide();
     m_classic_buttons_box->hide();
   }
+
+  // Without this, switching between attachments can leave the Stick/IR widgets excessively large
+  adjustSize();
+  resize(sizeHint());
 }
 
-void WiiTASInputWindow::hideEvent(QHideEvent* event)
+void WiiTASInputWindow::hideEvent(QHideEvent* const event)
 {
   GetWiimote()->ClearInputOverrideFunction();
   GetExtension()->ClearInputOverrideFunction();
+
+  TASInputWindow::hideEvent(event);
 }
 
-void WiiTASInputWindow::showEvent(QShowEvent* event)
+void WiiTASInputWindow::showEvent(QShowEvent* const event)
 {
-  WiimoteEmu::Wiimote* wiimote = GetWiimote();
+  LoadExtensionAndMotionPlus();
+
+  TASInputWindow::showEvent(event);
+}
+
+void WiiTASInputWindow::UpdateInputOverrideFunction()
+{
+  WiimoteEmu::Wiimote* const wiimote = GetWiimote();
 
   if (m_active_extension != WiimoteEmu::ExtensionNumber::CLASSIC)
     wiimote->SetInputOverrideFunction(m_wiimote_overrider.GetInputOverrideFunction());
diff --git a/Source/Core/DolphinQt/TAS/WiiTASInputWindow.h b/Source/Core/DolphinQt/TAS/WiiTASInputWindow.h
index c47ffde55b..2380afe617 100644
--- a/Source/Core/DolphinQt/TAS/WiiTASInputWindow.h
+++ b/Source/Core/DolphinQt/TAS/WiiTASInputWindow.h
@@ -34,13 +34,17 @@ public:
   void hideEvent(QHideEvent* event) override;
   void showEvent(QShowEvent* event) override;
 
+  void UpdateExtension(int extension);
+  void UpdateMotionPlus(bool attached);
+
 private:
   WiimoteEmu::Wiimote* GetWiimote();
   ControllerEmu::Attachments* GetAttachments();
   WiimoteEmu::Extension* GetExtension();
 
-  void UpdateExt();
   void LoadExtensionAndMotionPlus();
+  void UpdateControlVisibility();
+  void UpdateInputOverrideFunction();
 
   WiimoteEmu::ExtensionNumber m_active_extension;
   bool m_is_motion_plus_attached;