As in the title, all the other poles can be upgraded to or from their Lighted variant to their Normal variant using the upgrade planner, but the Big Electric Pole refuses to act like the rest of the base game power poles.
Fast Replacing normal Big Electric Poles with their Lighted version works fine, trying to use the base-game Upgrade Planner to select any number of them for upgrade automatically via construction bots refuses to select the big electric poles, and attempting to hard-set a filter inside said upgrade planner refuses to allow me to select both Big Electric Pole and the Lighted version at the same time, no matter if I'm trying to "upgrade" or "downgrade" to/from the lighted version of the pole.
Steps to reproduce:
Start a game, put down some number of Big Electric Poles, then try to select them with an Upgrade Planner and watch as it refuses to select them.
Put down some number of any other kinds of vanilla electric poles, and the upgrade planner happily selects them for upgrade with their Lighted variant, preserving the quality of the original electric pole.

Whatever it is that actually caused this, it seems like this should be an easy fix, because it's already doing what I want for all the other electric poles, the problem is that it's not doing the same thing for the Big Electric Pole for some reason.