Act 5 random monsters, are they the same when you start a new game little time after exit another?

Hi

I started doing

Baal runs on the last days, and kept the impression that the monster types on Act 5, that I thought were randonlly new for each game, were acctually almost the same (on a specific area) when I doing 2-3 games in sequence.

As if the monster types choosen for an area were kept the same over a period of time (similar to

Terror Zones)

I noticed that, because, more than once I tried to started a new game to change some anoying monster type, and it and the other 2-3 types choosen for the area, seemed to keep the same...

Only when I try to to run other areas and come back to the first area on another late game, the monster types had changed...

In the past I normally just created Solo/Closed games...
and the feeling is that each game the monsters were different in the same area on Act 5 - limited from a list yes, but a different set of monsters on each game.

Recently I started to create Lobby games and now the feeling is that the same "set" of monsters repeats for 2-3 games...
(like 3 games in row with Burning Soul, or 3 games na row with poison mage skeletons)

But may be just "luck"
or false impressions, as we probably tend to "remember more" when we don't like the monsters spawned...

Arreat Summit shows the list of monsters that appear in each act, including guest monsters.

"Guest Monsters:
In Nightmare and Hell Difficulty, Act V becomes inhabited with the stragglers of previous demon armies which you have fought in the past. The types of enemies that appear are random. They are also more powerful than in previous Acts. By the inclusion of these "guest monsters" Act V in Nightmare and Hell truly becomes an amalgam of all of the Acts in the game, and the ultimate challenge to Diablo II players."

https://classic.battle.net/diablo2exp/m ... act5.shtml