They stole my city without a fight!

[42VA]

I've been playing this module for a few days (and loving it, thanks guys!)

However, I just saw this happen:
Thot Gor declares war on me
Few END TURNs occur (I bombard them a few times during this)
Then, with one Light IV and one Borg Cube in the planet square, my system is taken without a fight!
No fair!
I can move out of the square and attack the units that took the system

Thoughts:
This could be the effect of a cloaking device; I have encountered a similar bug: systems appear to be undefended, but when I move in to the square, the city is not captured
If this is the situation, I respectfully submit that one needs changing

Saves below:

 

[apenpaap]

Yes, the cloaking device has this effect: unless your enemy has a unit with Tachyon detector in range, you can't conquer his cities, and your cloaked units don't defend their city.

 

[Deon]

The easy solution is to make two interchangeable promotions:
1) cloaked
2) uncloaked

Then you should be able to swap them via an action. Also define via python to automatically swap them if the unit enters a city for AI.