It does the work when disabled, at least fixed the problem with powered rails from bio industries, but seems you can't really enable it again, for medium power poles they still connect with diagonal or other shapes.
when it is working, it does not connect to big electric poles for some reason, sure big electric ones have 4 tiles base and the medium only have 1, but it does not work with any possible position. For the map view, they should connect with the base tile if both are in the same line, something like
X = space
E = medium
B = big electric pole
XXXXXX
XXXXBB
EXXXBB
XXXXXX
something like this should connect.