Thank you for the replies. I agree that this is not a bug, since it works as the rules described in the wiki, but it still breaks my grids. :( The real example is a grid of big poles with medium poles next to a wall with laser turrets. If I want to expand my base with the grid blueprint, the new big...

This is not a critical but annoying bug. I'm playing with a blueprint grid (4x4 big electric poles). If I place small or medium poles in between, the big poles do not connect. First I have to remove it and replace on of them, then it gets connected. Build order with no connection screenshot_425.jpg ...