Core/Vehicles:

- Temporarily unsummon pets when entering vehicle and resummon them when exiting. Also fixes missing pet cast bars on exit.
- Correct SMSG_PET_SPELLS packet for vehicle spell initialize

src/server/game/Entities/Unit/Unit.cpp

@@ -16833,12 +16833,11 @@ void Unit::_EnterVehicle(Vehicle* vehicle, int8 seatId, AuraApplication const* a
         // drop flag at invisible in bg
         if (Battleground *bg = plr->GetBattleground())
             bg->EventPlayerDroppedFlag(plr);
-    }
 
-    if (Player* thisPlr = this->ToPlayer())
-    {
         WorldPacket data(SMSG_ON_CANCEL_EXPECTED_RIDE_VEHICLE_AURA, 0);
-        thisPlr->GetSession()->SendPacket(&data);
+        plr->GetSession()->SendPacket(&data);
+
+        plr->UnsummonPetTemporaryIfAny();
     }
 
     ASSERT(!m_vehicle);
@@ -16912,6 +16911,9 @@ void Unit::_ExitVehicle(Position const* exitPosition)
     SendMonsterMoveExitVehicle(&pos);
     Relocate(&pos);
 
+    if (Player* plr = ToPlayer())
+        plr->ResummonPetTemporaryUnSummonedIfAny();
+
     WorldPacket data2;
     BuildHeartBeatMsg(&data2);
     SendMessageToSet(&data2, false);