K0Lb@zzeR
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What makes you think this is a bug? :) The Computer has the right to kill any player's hero. In a battle, it can suffer significant losses. Artifacts and a killed hero are its fair reward; maybe it was specifically hunting for that hero. What's the bug? Especially if it also used shackles. You've already been asked here - why have shackles of war then? :) I agree with all the points now regarding the ransom for escaped, bought-out, and deceased heroes.
The bug is that in Heroes 3, you can re-purchase KILLED heroes, specifically KILLED ones. And I believe that it doesn't matter whose hero it was: YOURS, THE OPPONENT'S PLAYER'S, THE OPPONENT'S COMPUTER'S, THE ALLIED COMPUTER'S; they still cannot be bought back from the tavern, and the criterion for knowing which ones can be is: The hero in the tavern will no longer be level 1.
I gave an example because I thought it would be clearer, but it turned out it wasn't.