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Issue description:

If you join a server using localhost, after owning a portable teleporter, it will only bind its owner to you for that session, once disconnected and reconnected again, the Portable teleporter will have its owner set to: null

Steps to reproduce:

1. Host a server on the same device that runs your client
2. Connect to the server using the IP: localhost
3. have a Portable Teleporter, set its owner to yourself
4. Disconnect and Reconnect to your server
5. Portable Teleporter now has its owner set to null

Version (make sure you are on the latest version before reporting):

Forge: forge-1.16.5-36.1.0
Mekanism: Mekanism-1.16.5-10.0.21.448
Other relevant version: N/A

If a (crash)log is relevant for this issue, link it here: (It's almost always relevant)

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DanteAyagawe.

Take a look at the labels. There is a Fixed in dev label. So this is already fixed, but you need to wait until Mekanism is released.

I reproduced this issue when I copied a whole curseforge folder to another pc because the other doesn't have sounds, the sound got fixed, but the portable teleporter now gets nulled when saving the game and then loading it again, this issue doesn't affect other players other than the pc that has the copied files.

Was playing Enigmatica 6

Edit:
LAN Game Server

Are you using offline server mode? That is inherently incompatible with ownership (even if your client is logged in)

Yes, however this does not seem to be a problem for other players on the server

I need to look into this further but from my very initial investigation I think in theory placing a security desk might work as a workaround and make any future claimed teleporters (or even maybe existing ones) not have this issue.