diff --git a/server/gameserver/creature.cc b/server/gameserver/creature.cc
index a0a9ed58..e181c8eb 100644
--- a/server/gameserver/creature.cc
+++ b/server/gameserver/creature.cc
@@ -949,10 +949,20 @@ void Creature::DoSkill(int skill_id,
     }
 #endif
     if (room->HasRoomSwitch(kRoomSwitchDisableUseSkill)) {
+#ifdef MYDEBUG
+        if (IsPlayer()) {
+            a8::XPrintf("DoSkill skill_id:%d 1\n", {skill_id});
+        }
+#endif
         return;
     }
     Skill* skill = GetSkill(skill_id);
     if (skill && CanUseSkill(skill_id)) {
+#ifdef MYDEBUG
+        if (IsPlayer()) {
+            a8::XPrintf("DoSkill skill_id:%d a\n", {skill_id});
+        }
+#endif
 #ifdef MYDEBUG
         if (IsPlayer()) {
             a8::XPrintf("DoSkill minor_type:%d\n", {skill->GetMinorType()});
@@ -1063,6 +1073,13 @@ void Creature::DoSkill(int skill_id,
             ptr.Attach(this);
             room->frame_event.AddPlaySkill(ptr, skill_id);
         }
+   } else {
+#ifdef MYDEBUG
+        if (IsPlayer()) {
+            CanUseSkill(skill_id);
+            a8::XPrintf("DoSkill skill_id:%d b\n", {skill_id});
+        }
+#endif
     }
 }
 
diff --git a/server/gameserver/player.cc b/server/gameserver/player.cc
index 09433716..56b355ac 100644
--- a/server/gameserver/player.cc
+++ b/server/gameserver/player.cc
@@ -944,12 +944,16 @@ void Player::_CMMove(f8::MsgHdr* hdr, const cs::CMMove& msg)
     }
 #endif
 #ifdef MYDEBUG1
-    a8::XPrintf("CMMove.Shot shot_sart:%d shot_hold:%d skill_hold:%d\n",
-                {
-                    msg.shot_start(),
-                        msg.shot_hold(),
-                        msg.skill_hold()
-                });
+    if (msg.skill_id()) {
+        a8::XPrintf("CMMove.Shot shot_sart:%d shot_hold:%d skill_hold:%d skill_id:%d seq:%d\n",
+                    {
+                     msg.shot_start(),
+                     msg.shot_hold(),
+                     msg.skill_hold(),
+                     msg.skill_id(),
+                     msg.seq()
+                    });
+    }
 #endif
     long long pre_frameno = last_cmmove_frameno_;
     last_cmmove_frameno_ = room->GetFrameNo();
diff --git a/server/gameserver/skill.cc b/server/gameserver/skill.cc
index 6ee909ca..bbd59a36 100644
--- a/server/gameserver/skill.cc
+++ b/server/gameserver/skill.cc
@@ -109,6 +109,19 @@ int Skill::GetMaxTimes()
 void Skill::NotifySkillState()
 {
     if (owner->IsHuman() || owner->IsCar()) {
+#ifdef MYDEBUG
+        if (owner->IsPlayer()) {
+            a8::XPrintf("last_frameno:%d room.frameno:%d tick_count:%d\n",
+                        {last_sync_frameno,
+                         owner->room->GetFrameNo(),
+                         a8::XGetTickCount()
+                        });
+        }
+#endif
+        last_sync_frameno = owner->room->GetFrameNo();
+        if (owner->IsPlayer() && last_sync_frameno > last_use_frameno + 2) {
+            int i = 0;
+        }
         if (GetCurrTimes() < GetMaxTimes()) {
             owner->room->frame_event.AddSkillCdChg(owner->AllocWeakPtr(), GetBaseSkillId(), GetCd());
         } else {
diff --git a/server/gameserver/skill.h b/server/gameserver/skill.h
index c351c004..8f34779a 100644
--- a/server/gameserver/skill.h
+++ b/server/gameserver/skill.h
@@ -25,6 +25,7 @@ class Skill
  public:
     Creature* owner = nullptr;
     long long last_use_frameno = 0;
+    long long last_sync_frameno = 0;
     a8::Attacher xtimer_attacher;
     int force_use_times = 0;
     glm::vec3 skill_pos = glm::vec3(0.0f, 0.0f, 0.0f);
diff --git a/third_party/f8 b/third_party/f8
index 78ca6cf8..94df666a 160000
--- a/third_party/f8
+++ b/third_party/f8
@@ -1 +1 @@
-Subproject commit 78ca6cf82f6d450f02f23827d6ed09e98cca046a
+Subproject commit 94df666a7847c8e98f372c2e7da2e2146546daa2