Fort deployables not working?

[Geronimo2006]

I've noticed when I create a fort and it is besieged, that while it says I can place deployables e.g. spikes, that when I clicked on the relevant icon, nothing happens. I also notice there is a yellow exclamation mark in a box on the screen before the battle that mentions the deployables.

Is this a bug? Or am I just not doing something right? I've noticed the same problem recently on Rome 2.

[justfun]

They work fine in my game, but deployment differs from time to time - somestimes you can put the stuff outside of your yellow control zone, sometimes only inside.

Where deployment is unfortunately not possible yet are the settlements. You get no onagers for the walls there, and in campaign battles there is also no boiling oil at the gates.

[Fanest]

there is boiling oil in higher lvl cities, as for deployables u can get them in special menu in deployment phase - next to where unit cards are