Hey guys, I completed this mission, killed everyone, and leveled up my heroes to level 26. However, I keep losing the final scene with the last assassin, and then it shows a teleport scene with demons or something. And then, surprise – the initial intro appears, telling me to start from the first mission of the first campaign...

Is this a bug, or am I doing something wrong?
I initially played the pirated version. Yesterday, I bought the licensed version, installed service packs up to 1.3, and loaded the save before taking the last city – the result is the same!

What should I do? I really don't want to replay the whole thing – I also need to work sometimes.