Legacy uses a different type of signaling to the engines and would never have this problem. Not something you would have been concerned with before.
The DCS signal travels between the power and common rails. I think you just need to create a break somewhere in the center rail so the DCS signal doesn't keep going round and round. Sidings probably need attention also. It won't bother the TMCC/Legacy signal at all. I think it would improve conventional signaling but it doesn't seem to be much of an issue.
