Custom items created with a behavior pack do not exist when loaded into a bedrock dedicated server that has enabled experimental features.

This issue is fairly easy to reproduce.

• On Minecraft for Windows 10, create a new world with experimental features enabled.
• Create a new minimal behavior pack that simply adds an item to the game.
• Load the pack into the local behavior packs folder, add it to the world within the Windows 10 game, and make sure the pack is working within the game.
• Exit the game, transfer both the world and the behavior pack to a BDS instance.
• Launch the server and connect with a client.
• Try to use the `give` command for the item that was created (even though it was created without an accompanying resource pack, the item should still exist within the game).
• For extra verification, validate that other experimental features work within the server (such as saving/loading structures), and add a simple function to the behavior pack to validate that it has loaded in properly.

Note: This was only tested on an Ubuntu 18.04 bedrock dedicated server, I don't know if the Windows version will experience the same issue.