Hi,
I’m having the same issue.
In my case I have 2 unity scenes (a menu and a game scene). I have the a map created with tile map on my menu scene and every time at runtime I go from the menu to the game I get this red warning on Unity console multiple times:
Destroying object multiple times. Don't use DestroyImmediate on the same object in OnDisable or OnDestroy.
UnityEngine.Object:DestroyImmediate(Object)
tk2dUtil:DestroyImmediate(Object) (at Assets/TK2DROOT/tk2d/Code/tk2dUtil.cs:50)
tk2dTileMap:OnDestroy() (at Assets/TK2DROOT/tk2dTileMap/Code/tk2dTileMap.cs:150)
On the Tilemap demo this doesn’t happen because there is only one scene and you don’t switch from that demo scene to a new scene.