Im running into this issue on the Kreate modpack v0.5.0 where wires dissapear when unloading the chunk. IMPORTANT DETAILS: The bug happens in the Nether, idk if its the same in the overworld, and it takes place when im teleporting from the nether to the overworld. Did not check to see if unloading chunks by walking away in the nether yelds same result. *note* ill come back with a reply as kreate just got updated and see if the bug is fixed and attempt the nether unloading also when the server will be back up.
Server is a normal forge server (according to the server admin).

To note, i tried only copper wires, as i haven`t tried other wires yet, idk if it applies to other types.

i was retarded, or fixed with v 0.6.0