diff --git a/rpcs3/Emu/NP/np_notifications.cpp b/rpcs3/Emu/NP/np_notifications.cpp
index dda857ae9c..14db3a6b8d 100644
--- a/rpcs3/Emu/NP/np_notifications.cpp
+++ b/rpcs3/Emu/NP/np_notifications.cpp
@@ -35,11 +35,14 @@ namespace np
 		rpcn_log.notice("Received notification that user %s(%d) joined the room(%d)", notif_data->roomMemberDataInternal->userInfo.npId.handle.data, notif_data->roomMemberDataInternal->memberId, room_id);
 		extra_nps::print_room_member_data_internal(notif_data->roomMemberDataInternal.get_ptr());
 
-		sysutil_register_cb([room_event_cb = this->room_event_cb, room_id, event_key, room_event_cb_ctx = this->room_event_cb_ctx, room_event_cb_arg = this->room_event_cb_arg, size = edata.size()](ppu_thread& cb_ppu) -> s32
-			{
-				room_event_cb(cb_ppu, room_event_cb_ctx, room_id, SCE_NP_MATCHING2_ROOM_EVENT_MemberJoined, event_key, 0, size, room_event_cb_arg);
-				return 0;
-			});
+		if (room_event_cb)
+		{
+			sysutil_register_cb([room_event_cb = this->room_event_cb, room_id, event_key, room_event_cb_ctx = this->room_event_cb_ctx, room_event_cb_arg = this->room_event_cb_arg, size = edata.size()](ppu_thread& cb_ppu) -> s32
+				{
+					room_event_cb(cb_ppu, room_event_cb_ctx, room_id, SCE_NP_MATCHING2_ROOM_EVENT_MemberJoined, event_key, 0, size, room_event_cb_arg);
+					return 0;
+				});
+		}
 	}
 
 	void np_handler::notif_user_left_room(std::vector<u8>& data)
@@ -67,11 +70,14 @@ namespace np
 		rpcn_log.notice("Received notification that user %s(%d) left the room(%d)", notif_data->roomMemberDataInternal->userInfo.npId.handle.data, notif_data->roomMemberDataInternal->memberId, room_id);
 		extra_nps::print_room_member_data_internal(notif_data->roomMemberDataInternal.get_ptr());
 
-		sysutil_register_cb([room_event_cb = this->room_event_cb, room_event_cb_ctx = this->room_event_cb_ctx, room_id, event_key, room_event_cb_arg = this->room_event_cb_arg, size = edata.size()](ppu_thread& cb_ppu) -> s32
-			{
-				room_event_cb(cb_ppu, room_event_cb_ctx, room_id, SCE_NP_MATCHING2_ROOM_EVENT_MemberLeft, event_key, 0, size, room_event_cb_arg);
-				return 0;
-			});
+		if (room_event_cb)
+		{
+			sysutil_register_cb([room_event_cb = this->room_event_cb, room_event_cb_ctx = this->room_event_cb_ctx, room_id, event_key, room_event_cb_arg = this->room_event_cb_arg, size = edata.size()](ppu_thread& cb_ppu) -> s32
+				{
+					room_event_cb(cb_ppu, room_event_cb_ctx, room_id, SCE_NP_MATCHING2_ROOM_EVENT_MemberLeft, event_key, 0, size, room_event_cb_arg);
+					return 0;
+				});
+		}
 	}
 
 	void np_handler::notif_room_destroyed(std::vector<u8>& data)
@@ -98,11 +104,14 @@ namespace np
 		auto& sigh = g_fxo->get<named_thread<signaling_handler>>();
 		sigh.disconnect_sig2_users(room_id);
 
-		sysutil_register_cb([room_event_cb = this->room_event_cb, room_event_cb_ctx = this->room_event_cb_ctx, room_id, event_key, room_event_cb_arg = this->room_event_cb_arg, size = edata.size()](ppu_thread& cb_ppu) -> s32
-			{
-				room_event_cb(cb_ppu, room_event_cb_ctx, room_id, SCE_NP_MATCHING2_ROOM_EVENT_RoomDestroyed, event_key, 0, size, room_event_cb_arg);
-				return 0;
-			});
+		if (room_event_cb)
+		{
+			sysutil_register_cb([room_event_cb = this->room_event_cb, room_event_cb_ctx = this->room_event_cb_ctx, room_id, event_key, room_event_cb_arg = this->room_event_cb_arg, size = edata.size()](ppu_thread& cb_ppu) -> s32
+				{
+					room_event_cb(cb_ppu, room_event_cb_ctx, room_id, SCE_NP_MATCHING2_ROOM_EVENT_RoomDestroyed, event_key, 0, size, room_event_cb_arg);
+					return 0;
+				});
+		}
 	}
 
 	void np_handler::notif_updated_room_data_internal(std::vector<u8>& data)
@@ -130,11 +139,14 @@ namespace np
 
 		rpcn_log.notice("Received notification that room(%d)'s data was updated", room_id);
 
-		sysutil_register_cb([room_event_cb = this->room_event_cb, room_event_cb_ctx = this->room_event_cb_ctx, room_id, event_key, room_event_cb_arg = this->room_event_cb_arg, size = edata.size()](ppu_thread& cb_ppu) -> s32
-			{
-				room_event_cb(cb_ppu, room_event_cb_ctx, room_id, SCE_NP_MATCHING2_ROOM_EVENT_UpdatedRoomDataInternal, event_key, 0, size, room_event_cb_arg);
-				return 0;
-			});
+		if (room_event_cb)
+		{
+			sysutil_register_cb([room_event_cb = this->room_event_cb, room_event_cb_ctx = this->room_event_cb_ctx, room_id, event_key, room_event_cb_arg = this->room_event_cb_arg, size = edata.size()](ppu_thread& cb_ppu) -> s32
+				{
+					room_event_cb(cb_ppu, room_event_cb_ctx, room_id, SCE_NP_MATCHING2_ROOM_EVENT_UpdatedRoomDataInternal, event_key, 0, size, room_event_cb_arg);
+					return 0;
+				});
+		}
 	}
 
 	void np_handler::notif_updated_room_member_data_internal(std::vector<u8>& data)
@@ -162,11 +174,14 @@ namespace np
 		rpcn_log.notice("Received notification that user's %s(%d) room (%d) data was updated", notif_data->newRoomMemberDataInternal->userInfo.npId.handle.data, notif_data->newRoomMemberDataInternal->memberId, room_id);
 		extra_nps::print_room_member_data_internal(notif_data->newRoomMemberDataInternal.get_ptr());
 
-		sysutil_register_cb([room_event_cb = this->room_event_cb, room_event_cb_ctx = this->room_event_cb_ctx, room_id, event_key, room_event_cb_arg = this->room_event_cb_arg, size = edata.size()](ppu_thread& cb_ppu) -> s32
-			{
-				room_event_cb(cb_ppu, room_event_cb_ctx, room_id, SCE_NP_MATCHING2_ROOM_EVENT_UpdatedRoomMemberDataInternal, event_key, 0, size, room_event_cb_arg);
-				return 0;
-			});
+		if (room_event_cb)
+		{
+			sysutil_register_cb([room_event_cb = this->room_event_cb, room_event_cb_ctx = this->room_event_cb_ctx, room_id, event_key, room_event_cb_arg = this->room_event_cb_arg, size = edata.size()](ppu_thread& cb_ppu) -> s32
+				{
+					room_event_cb(cb_ppu, room_event_cb_ctx, room_id, SCE_NP_MATCHING2_ROOM_EVENT_UpdatedRoomMemberDataInternal, event_key, 0, size, room_event_cb_arg);
+					return 0;
+				});
+		}
 	}
 
 	void np_handler::notif_room_message_received(std::vector<u8>& data)