This was done on purpose by the devs cause there was a way to place Towers below the green dots, making them turrets, for example you could have placed the Anti Infantry tower to the level of a turret... Ironically this made construction playable - the real construction. Because of all the changes and excrete they added into the game. I have confirmed with multiple people having this same issue and it hasn't been fixed yet, it's been like this for a week. Some structures can not be placed at all, for example in the screenshot above, impossible to place AV turret. And same with one of the most important assets for the frontline bases, vehicle terminal, it cannot be placed at a safe level, it needs to be so high that it cannot be used anymore.. Lastly a message to the devs, if you don't know how to place an Vehicle terminal inside your frontline base, and protect it from getting infiltrated, then you should rather not touch construction, ok? Pain Spire does not counter infiltrators, you need a base design for this, Pain Spire causes more balance issues with construction, well both Spires but at least you fixed the second one. Do not touch construction if you don't understand it, cause I have a feeling you plan on turning it into some Fortnite type of hyper paced, gay base building. You can't be trusted.