diff --git a/src/core/hle/service/am/lifecycle_manager.h b/src/core/hle/service/am/lifecycle_manager.h
index ae041d3e29..15657a36d8 100644
--- a/src/core/hle/service/am/lifecycle_manager.h
+++ b/src/core/hle/service/am/lifecycle_manager.h
@@ -92,6 +92,13 @@ public:
         }
     }
 
+    void RequestFocusStateChangedNotification(Kernel::KernelCore& kernel) {
+        if (m_focus_state_changed_notification_enabled) {
+            m_has_focus_state_changed = true;
+            this->SignalSystemEventIfNeeded(kernel);
+        }
+    }
+
     void OnOperationAndPerformanceModeChanged(Kernel::KernelCore& kernel);
 
 public:
diff --git a/src/core/hle/service/am/service/library_applet_accessor.cpp b/src/core/hle/service/am/service/library_applet_accessor.cpp
index c49b1f3f05..849e5794cf 100644
--- a/src/core/hle/service/am/service/library_applet_accessor.cpp
+++ b/src/core/hle/service/am/service/library_applet_accessor.cpp
@@ -164,14 +164,14 @@ Result ILibraryAppletAccessor::PushInData(SharedPointer<IStorage> storage) {
 Result ILibraryAppletAccessor::PopOutData(Out<SharedPointer<IStorage>> out_storage) {
     LOG_DEBUG(Service_AM, "called");
 
-    if (auto caller_applet = m_applet->caller_applet.lock(); caller_applet) {
-        caller_applet->lifecycle_manager.GetSystemEvent().Signal(system.Kernel());
-        caller_applet->lifecycle_manager.RequestResumeNotification();
-        caller_applet->lifecycle_manager.GetSystemEvent().Clear(system.Kernel());
-        caller_applet->lifecycle_manager.UpdateRequestedFocusState();
-    }
-
     R_TRY(m_broker->GetOutData().Pop(system.Kernel(), out_storage.Get()));
+    if (auto caller_applet = m_applet->caller_applet.lock(); caller_applet) {
+        std::scoped_lock lk{caller_applet->lock};
+        const bool focus_state_changed = caller_applet->lifecycle_manager.UpdateRequestedFocusState();
+        const bool is_front_app = m_applet->frontend && caller_applet->lifecycle_manager.IsApplication();
+        if (focus_state_changed) caller_applet->lifecycle_manager.SignalSystemEventIfNeeded(system.Kernel());
+        else if (is_front_app) caller_applet->lifecycle_manager.RequestFocusStateChangedNotification(system.Kernel());
+    }
 
     if (m_applet->applet_id == AppletId::ProfileSelect && *out_storage) {
         auto impl = (*out_storage)->GetImpl();
diff --git a/src/core/hle/service/hid/hid_system_server.cpp b/src/core/hle/service/hid/hid_system_server.cpp
index f3c01b5d89..e544adf03c 100644
--- a/src/core/hle/service/hid/hid_system_server.cpp
+++ b/src/core/hle/service/hid/hid_system_server.cpp
@@ -121,7 +121,7 @@ IHidSystemServer::IHidSystemServer(Core::System& system_, std::shared_ptr<Resour
         {547, nullptr, "GetAllowedBluetoothLinksCount"},
         {548, &IHidSystemServer::GetRegisteredDevices, "GetRegisteredDevices"},
         {549, nullptr, "GetConnectableRegisteredDevices"},
-        {551, nullptr, "GetRegisteredDevicesForControllerSupport"}, //20.0.0+
+        {551, &IHidSystemServer::GetRegisteredDevices, "GetRegisteredDevicesForControllerSupport"}, //20.0.0+ //mocked via 548 for Diablo 3 (at least)
         {700, nullptr, "ActivateUniquePad"},
         {702, &IHidSystemServer::AcquireUniquePadConnectionEventHandle, "AcquireUniquePadConnectionEventHandle"},
         {703, &IHidSystemServer::GetUniquePadIds, "GetUniquePadIds"},
@@ -758,7 +758,7 @@ void IHidSystemServer::AcquireDeviceRegisteredEventForControllerSupport(HLEReque
 }
 
 void IHidSystemServer::GetRegisteredDevices(HLERequestContext& ctx) {
-    LOG_WARNING(Service_HID, "(STUBBED) called");
+    LOG_WARNING(Service_HID, "(STUBBED) called, command={}", ctx.GetCommand()); //548 or 551
 
     struct RegisterData {
         std::array<u8, 0x68> data;
diff --git a/src/hid_core/resources/npad/npad.cpp b/src/hid_core/resources/npad/npad.cpp
index e7a1ee2bf3..c67f839df1 100644
--- a/src/hid_core/resources/npad/npad.cpp
+++ b/src/hid_core/resources/npad/npad.cpp
@@ -398,21 +398,21 @@ void NPad::InitNewlyAddedController(Kernel::KernelCore& kernel, u64 aruid, Core:
 void NPad::WriteEmptyEntry(NpadInternalState* npad) {
     NPadGenericState dummy_pad_state{};
     NpadGcTriggerState dummy_gc_state{};
-    dummy_pad_state.sampling_number = npad->fullkey_lifo.ReadCurrentEntry().sampling_number + 1;
+    dummy_pad_state.sampling_number = npad->fullkey_lifo.ReadCurrentEntry().state.sampling_number + 1;
     npad->fullkey_lifo.WriteNextEntry(dummy_pad_state);
-    dummy_pad_state.sampling_number = npad->handheld_lifo.ReadCurrentEntry().sampling_number + 1;
+    dummy_pad_state.sampling_number = npad->handheld_lifo.ReadCurrentEntry().state.sampling_number + 1;
     npad->handheld_lifo.WriteNextEntry(dummy_pad_state);
-    dummy_pad_state.sampling_number = npad->joy_dual_lifo.ReadCurrentEntry().sampling_number + 1;
+    dummy_pad_state.sampling_number = npad->joy_dual_lifo.ReadCurrentEntry().state.sampling_number + 1;
     npad->joy_dual_lifo.WriteNextEntry(dummy_pad_state);
-    dummy_pad_state.sampling_number = npad->joy_left_lifo.ReadCurrentEntry().sampling_number + 1;
+    dummy_pad_state.sampling_number = npad->joy_left_lifo.ReadCurrentEntry().state.sampling_number + 1;
     npad->joy_left_lifo.WriteNextEntry(dummy_pad_state);
-    dummy_pad_state.sampling_number = npad->joy_right_lifo.ReadCurrentEntry().sampling_number + 1;
+    dummy_pad_state.sampling_number = npad->joy_right_lifo.ReadCurrentEntry().state.sampling_number + 1;
     npad->joy_right_lifo.WriteNextEntry(dummy_pad_state);
-    dummy_pad_state.sampling_number = npad->palma_lifo.ReadCurrentEntry().sampling_number + 1;
+    dummy_pad_state.sampling_number = npad->palma_lifo.ReadCurrentEntry().state.sampling_number + 1;
     npad->palma_lifo.WriteNextEntry(dummy_pad_state);
-    dummy_pad_state.sampling_number = npad->system_ext_lifo.ReadCurrentEntry().sampling_number + 1;
+    dummy_pad_state.sampling_number = npad->system_ext_lifo.ReadCurrentEntry().state.sampling_number + 1;
     npad->system_ext_lifo.WriteNextEntry(dummy_pad_state);
-    dummy_gc_state.sampling_number = npad->gc_trigger_lifo.ReadCurrentEntry().sampling_number + 1;
+    dummy_gc_state.sampling_number = npad->gc_trigger_lifo.ReadCurrentEntry().state.sampling_number + 1;
     npad->gc_trigger_lifo.WriteNextEntry(dummy_gc_state);
 }