Core/Maps: Properly set initial spawn group state for groups that have conditions

Port From (https://github.com/TrinityCore/TrinityCore/commit/fb64d7fe8efe5ecba40123cdc96195d3ca52d7c0)

Source/Game/Maps/MapManager.cs

@@ -49,6 +49,7 @@ namespace Game.Entities
             Map map = new Map(mapId, i_gridCleanUpDelay, instanceId, Difficulty.None);
             map.LoadRespawnTimes();
             map.LoadCorpseData();
+            map.InitSpawnGroupState();
 
             if (WorldConfig.GetBoolValue(WorldCfg.BasemapLoadGrids))
                 map.LoadAllCells();
@@ -82,6 +83,7 @@ namespace Game.Entities
 
             map.CreateInstanceData();
             map.SetInstanceScenario(Global.ScenarioMgr.CreateInstanceScenario(map, team));
+            map.InitSpawnGroupState();
 
             if (WorldConfig.GetBoolValue(WorldCfg.InstancemapLoadGrids))
                 map.LoadAllCells();
@@ -97,6 +99,7 @@ namespace Game.Entities
             Cypher.Assert(map.IsBattlegroundOrArena());
             map.SetBG(bg);
             bg.SetBgMap(map);
+            map.InitSpawnGroupState();
 
             if (WorldConfig.GetBoolValue(WorldCfg.BattlegroundMapLoadGrids))
                 map.LoadAllCells();
@@ -108,6 +111,7 @@ namespace Game.Entities
         {
             GarrisonMap map = new GarrisonMap(mapId, i_gridCleanUpDelay, instanceId, owner.GetGUID());
             Cypher.Assert(map.IsGarrison());
+            map.InitSpawnGroupState();
             return map;
         }