If having escaped previously, and starting a new game and electing to start with the Starting Crates, those starting crates are unable to be attached to a container shelf. This makes them less useful for raft travel.
New game, Starting Crates Yes. Create a container shelf. Be unable to add either of the starting crates to the container shelf.
-Have you tried reloading your save, game or PC? Yes, rebooted pc. tried a new game. Launched from a save.
-Have tried reinstalling the game? No
-Is there anything else you tried to alleviate the issue? Please let us know whether it was successful or not. Tried multiple games, new, load from a save.