[2020] Electricity is cool!

I've just been playing with it on a staging server and it's pretty neat.

Unfortunately there is a hiccup with the Cable Tunnel. Any time a battery directly passes through the cable tunnel, the cable tunnel stops the electricity pass through.

So if i have a solar panel on my roof and run a line from the solar panel, through a cable tunnel, to a battery, everything is fine.

If i run a line from a battery to a switch, everything is fine.

But if i put a cable tunnel between a battery and anything else, electricity stops.

If possible, can this be adjusted so that electricity from the batter can be cabled (piped through) a "cable tunnel"?