When I crossed The end and Overworld with the Rf-Tools Transmitter my Extra Inventory items were gone plus some Environmental Tech Soral pannels and 1 Solar array tier 2 with 7 modifiers and Tinkers items

The inventory cake one I wish I was able to give you more information about the mod but I have problem with the electricity and I can't run my desktop

And that happens only when I use the RF tools dialing device

Its from Cyclic mod

When you say "extra inventory" what do you mean? Just items in your player inventory not on hotbar or a backpack or what?

I think this could have been a temporary/visual/networking issue. I've sometimes had the extra inventory appear empty but be "restored" when looking again a few minutes later.

Any issues with in-game problems on the official server (such as lost item reimbursement) is not done on this issue tracker but in the server's discord channel.