All other logic blocks have auto link enabled, meaning that if you place other logic related blocks down while you have that block select, it links them.
This does not happen for activation gate and the area trigger controllers but it should, since it's just like any logic block.
The auto link does work fine for their own module though (activation gate controllers auto links activation gate modules, same for area triggers)
Maybe not really a bug, but it feels like an inconsistency to me.