diff --git a/server/gameserver/android.ai.cc b/server/gameserver/android.ai.cc
index e60ab34..9d00ed8 100644
--- a/server/gameserver/android.ai.cc
+++ b/server/gameserver/android.ai.cc
@@ -347,7 +347,11 @@ void AndroidAI::UpdateAttack()
     }
 #ifdef DEBUG
     if (App::Instance()->HasFlag(20)) {
+        #if 1
+        ChangeToStateNewAI(ASE_RandomWalk);
+        #else
         ChangeToStateNewAI(ASE_Thinking);
+        #endif
         return;
     }
 #endif
diff --git a/server/gameserver/entity.h b/server/gameserver/entity.h
index 8b1021a..79d3f19 100644
--- a/server/gameserver/entity.h
+++ b/server/gameserver/entity.h
@@ -12,7 +12,7 @@ namespace cs
 struct ObjectSyncFlags
 {
     unsigned char flags = 0;
-    unsigned char last_sync_frameno = 0;
+    int last_sync_frameno = 0;
 };
 #pragma pack()
 
@@ -77,10 +77,10 @@ class Entity
     EntityWeakPtrChunk* GetEntityWeakPtrChunk() { return &entity_weak_ptr_chunk_; };
     EntityWeakPtr AllocEntityWeakPtr();
     EntityWeakPtr& GetEntityWeakPtrRef();
-
-protected:
     bool IsClientCached(Human* hum);
     bool CanClientCache(Human* hum);
+
+protected:
     void AddClientCache(Human* hum);
 
 private:
diff --git a/server/gameserver/framemaker.cc b/server/gameserver/framemaker.cc
index 5d56716..e23a624 100644
--- a/server/gameserver/framemaker.cc
+++ b/server/gameserver/framemaker.cc
@@ -96,7 +96,7 @@ cs::SMUpdate* FrameMaker::MakeUpdateMsg(Human* hum)
                 ((Human*)e)->HasBuffEffect(kBET_Fly)){
                 continue;
             }
-            if (hum->IsPlayer() && e->CanSeeMe(hum)) {
+            if ((hum->IsPlayer() || hum->HasObserver()) && e->CanSeeMe(hum)) {
                 e->FillMFObjectFull(room, (Human*)hum, msg->add_full_objects());
 #ifdef DEBUG
                 if (e->GetEntityType() == ET_Car) {
diff --git a/server/gameserver/human.cc b/server/gameserver/human.cc
index 395b5a0..5ffeb47 100644
--- a/server/gameserver/human.cc
+++ b/server/gameserver/human.cc
@@ -1412,6 +1412,11 @@ void Human::RemoveObserver(Human* observer)
     observers_.erase(observer);
 }
 
+bool Human::HasObserver()
+{
+    return !observers_.empty();
+}
+
 void Human::SendUpdateMsg()
 {
     if (!follow_target_ && !a8::HasBitFlag(status, CS_Disable)) {
@@ -2804,10 +2809,16 @@ void Human::NotifyObservers(cs::SMUpdate* msg, cs::MFActivePlayerData* active_pl
             msg->set_active_player_id(GetUniId());
             FillMFActivePlayerData(msg->mutable_active_player_data());
             if (!refreshed_view) {
+                std::set<int> synced_objects;
+                {
+                    for (auto& full_obj : msg->full_objects()) {
+                        synced_objects.insert(full_obj.obj_uniid());
+                    }
+                }
                 std::set<Entity*> view_objects;
                 GetViewObjects(view_objects);
                 for (Entity* entity : view_objects) {
-                    if (new_objects.find(entity->GetUniId()) == new_objects.end()) {
+                    if (synced_objects.find(entity->GetUniId()) == synced_objects.end()) {
                         entity->FillMFObjectFull(room, this, msg->add_full_objects());
                     }
                 }
@@ -2823,6 +2834,42 @@ void Human::NotifyObservers(cs::SMUpdate* msg, cs::MFActivePlayerData* active_pl
                 msg->clear_active_player_data();
             }
         }
+        if (observer != this) {
+            for (int i = 0; i < msg->full_objects_size(); ++i) {
+                cs::MFObjectFull* full_obj = msg->mutable_full_objects(i);
+                if (a8::HasBitFlag(full_obj->object_flags(), kOfReadCache)) {
+                    Entity* e = room->GetEntityByUniId(full_obj->obj_uniid());
+                    if (e) {
+                        if (!e->IsClientCached(observer)) {
+#ifdef DEBUG
+                            ObjectSyncFlags old_sync_flags = *(observer->GetObjectSyncFlags(e->GetUniId()));
+#endif
+                            e->FillMFObjectFull(room, observer, full_obj);
+#ifdef DEBUG
+                            ObjectSyncFlags* new_sync_flags = observer->GetObjectSyncFlags(e->GetUniId());
+                            observer->SendDebugMsg(a8::Format(
+                                                              "resync full frameno:%d uniid:%d net_flags:%d f2:%d "
+                                                              "old_flags:%d,%d new_flags:%d,%d",
+                                                              {
+                                                               room->GetFrameNo(),
+                                                               full_obj->obj_uniid(),
+                                                               full_obj->object_flags(),
+                                                               msg->full_objects(i).object_flags(),
+                                                               old_sync_flags.flags,
+                                                               old_sync_flags.last_sync_frameno,
+                                                               new_sync_flags->flags,
+                                                               new_sync_flags->last_sync_frameno,
+                                                              }));
+#endif
+                        }
+                    } else {
+#ifdef DEBUG
+                        abort();
+#endif
+                    }
+                }
+            }
+        }
         observer->SendNotifyMsg(*msg);
     }
 }
@@ -3598,6 +3645,13 @@ void Human::OnBulletHit(Bullet* bullet)
         HasBuffEffect(kBET_Fly)) {
         return;
     }
+    #ifdef DEBUG
+    #if 0
+    if (IsPlayer()) {
+        return;
+    }
+    #endif
+    #endif
 
     RemoveBuffByEffectId(kBET_PeaceMode);
     if (!dead && (bullet->IsBomb() || bullet->sender.Get()->team_id != team_id)) {
diff --git a/server/gameserver/human.h b/server/gameserver/human.h
index 7796bd4..1cf1b0a 100644
--- a/server/gameserver/human.h
+++ b/server/gameserver/human.h
@@ -231,6 +231,7 @@ class Human : public Creature
     void FillBodyState(::google::protobuf::RepeatedPtrField<::cs::MFBodyState>* states);
     void AddObserver(Human* observer);
     void RemoveObserver(Human* observer);
+    bool HasObserver();
     void SendUpdateMsg();
     template <typename T>
     void SendNotifyMsg(T& msg)
diff --git a/server/gameserver/incubator.cc b/server/gameserver/incubator.cc
index bcc62c7..fbf6a77 100644
--- a/server/gameserver/incubator.cc
+++ b/server/gameserver/incubator.cc
@@ -44,9 +44,11 @@ void Incubator::AllocAndroid(Human* target, int num)
         } else {
             room->EnableHuman(hum);
 #ifdef DEBUG
+            #if 0
             if (!target->InNewObjects(hum)) {
                 abort();
             }
+            #endif
             if (hum->dead) {
                 abort();
             }