I found it in 1.07 and doesnt know if it fixed.
I played Russia and was in war against Austria. One of my provinces(Podolia) was sieging by Rebels. At same time Austria send an army to Podolia too. While they fighting each other i can build in Podolia whatever I want, army, promotions, fortress etc. After Austria beat Rebels, the typical siege window show up again when clicking on province.
I played Russia and was in war against Austria. One of my provinces(Podolia) was sieging by Rebels. At same time Austria send an army to Podolia too. While they fighting each other i can build in Podolia whatever I want, army, promotions, fortress etc. After Austria beat Rebels, the typical siege window show up again when clicking on province.