HoMM3 HD is a mod (add-on) for the game Heroes of Might and Magic 3.

to baratorch, regarding the bug with Jaegar. Yes, he was with the Red player and spent the night in the field. They loaded and unloaded several times. The Red player didn't immediately notice the bug and can't pinpoint exactly when it occurred. It was a game against the AI, and during the turn transfer, the heroes flickered with a different color.
By the way, another bug. We've already talked about it. It also happens in SoD. But with the mod, it seems to happen much more often. This is when, on the map during the opponent's turn, your hero disappears, often the main hero or the one with the bag (as if they put on an invisibility cloak). The hero remains in the list on the panel. And it's interesting, does he also disappear for the opponent?
Regarding the complete transfer of the army, perhaps it would be better with a selection of the desired unit. And also, maybe make it a hybrid with intelligent transfer. That is, if you want to leave the fastest and cheapest unit (taking into account the terrain), you simply transfer, and if you want to leave a specific unit, you select it. Although this might be confusing. And the transfer itself - with a key or the mouse... For example, you could assign a button from the top number pad, where the number corresponds to the stack number with the preferred unit, or explicitly select the desired stack with the mouse, and the transfer itself is done with a key.

...the effect of camouflage has been changed, it is no longer possible to spy on the opponent, the sale of artifacts has been changed. naturally, this changes the gameplay...

Again... some have sulfur in their nagabank, and others have dragonstones. People don't really complain about this bug, including the fixed one. The basilisks that Bron has at the start also suit everyone. At higher starting speeds for Gem, Ivora, Moner... they also don't focus on it. Since it exists, they just accept it.