Platform: Windows
Build: Both bleeding edge 9408 and release 104.10
Issue: You can teleport items with multiple cores.

I'm not sure this is that big of a problem, since most maps only have one core.
Steps to reproduce: Make a map with two cores, put any material in one of them, and you can unload from anything
Place an X (no spaces) between the brackets to confirm that you have read the line below.
this is normal/intended, entirely up to the discretion of the map author, and not under normal circumstances 馃槜