How do I prevent Tilemap reloading when restarting layout?

I have a very large layout with a couple of very large tilemaps.

When I restart the layout, it takes several seconds to load, which seems to have a correlation to the tilemaps being loaded.

Does anyone have info about this process and ways I may get around this? The tilemaps don't ever change, so It'd be great if they don't reload.

I tried adding the persist behavior, but that doesn't help.

Could making it global and just hiding it/disabling it’s solid behavior when changing to another layout work?

The idea is to just always keep it loaded to avoid the recreating overhead which is more significant due to the amount of tiles.

Thanks R0j0hound! I forgot about the global property.

That helped me fix the issue. It was also the fact I was loading objects based on the tilemap, so I also made those global and loaded them only in the start of game.

Now it loads very quickly when I restart the layout (the whole game will run on one layout).

Nice. Glad it helped