Core/Creatures: Dismount creatures without CREATURE_TYPEFLAGS_MOUNTED_COMBAT when entering combat

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

@@ -11892,6 +11892,9 @@ void Unit::SetInCombatState(bool PvP, Unit* enemy)
             UpdateSpeed(MOVE_SWIM, true);
             UpdateSpeed(MOVE_FLIGHT, true);
         }
+
+        if (!(ToCreature()->GetCreatureInfo()->type_flags & CREATURE_TYPEFLAGS_MOUNTED_COMBAT))
+            Unmount();
     }
 
     for (Unit::ControlList::iterator itr = m_Controlled.begin(); itr != m_Controlled.end(); ++itr)