The game locks up while in the map view after finishing the map (after destroying the enemy heart of the dungeon).

When I start an attack on the enemy heart of the dungeon, and I will enter to the map view, and if then the heart will be destroyed and I win, the game locks up (something like freeze but not exactly - I still can move a mouse cursor, the game is running and I hear the music and sounds). I just can't leave the map view nor finish (leave) the map, because both the keyboard's keys presses and mouse's clicks wont take any effect on the game, but I still can move the mouse cursor and the system still responds to keyboard and mouse, so I have to press some shortcuts to get the task manager on and kill the game process from the task manager..

What's wrong? Has anyone ever had like that, and so can you confirm this as another nasty bug in the game?