Larian Studios Forums Divinity: Original Sin 2 - The Modding Dungeon Divinity - Original Sin 2 - Modding Troubleshooting Objects Disappearing?

I load my map in the engine, everything is exactly where I left it. Load up the map in GM Mode, many objects are now missing. I load the map in the engine again, objects are just the way I left them.

Any ideas on how I can begin to remedy this?