The Refugee Camp, Chalet de la Paix, and to a lesser extent the Mansion are all just really unhealthy for the game. I get that the devs wanted to put some narrative stuff in there, but in these cases they've removed the strategy element of the game and replaced it with savescum-style metagaming because you need to know that these scripted battles will occur and position your squad and plan accordingly. It's no fault of the player that they find themselves in these scenarios since the game doesn't give you much of a choice and frankly these battles are not interesting, fun, or challenging once you know how they work.