How to break through the Gate of Oblivion on Jebus in week 2?

22 giants blocked the path, 7 of which were titans...
Came back a week later, and there were 22 giants without the 7 titans, meaning all the giants were there.

Stop! Isn't that strange? I think that at the start of the game, it decides in which cell of the map a powerful stack will be, and this information is stored in the save files and cannot change on its own. And if this stack disappears, it means that someone attacked this monster stack but didn't defeat it: this is a known phenomenon, and, by the way, the rules usually prohibit weakening neutral creatures in this way - that is, if you attack a stack with a powerful unit, you must fight to the end!