Walkthroughs for custom maps.

Hello everyone. I've encountered a strange problem: I started the map "Metataxer's Revenge" and am reading RoseKavalier's walkthrough. In it, on day 117, he suggests giving Vertigo and a ballista to the computer so that on day 121, you can buy him back in the tavern along with the ballista, as it is set in the hero's settings for the map, and he will return with it in any case. However, in my game, he returns without the ballista, only with the enchanters. I've already tried disabling HD+ and just running the game without it – it didn't help. I opened the map in the editor – the hero does indeed have the ballista. Can anyone tell me what might be wrong?