Is this a bug in the AI or in the game engine? And what is the nature of this bug?
If needed, I can provide a save file with a description of the turn order in the battle that leads to this situation.
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Many players also request that the battle window and town window open in full screen, as in the original.
I would also like to be able to disable this feature at will.
You have to enable/disable quick battle quite often.
Can you add Save and Load buttons to the right menu, where the heroes are displayed?

HW_rules_mod_1.40 is outdated; HW rules are integrated into the HD mod. Try creating Hd.exe and replacing the current executable with it.
Understood. But is it worth the effort to launch the original executable? Is SuperPack necessary, and is it still relevant?
I can't answer that for sure, it seems to be just a localization patch. In any case, there's no need to install it.