I've been trying to investigate an error for a while now without being able to resolve it. And I ended up discovering that the error actually comes from the tmdb API itself, which cancels the operation if there are two calls in parallel. These two calls are distinct, with different parameters. And this response causes both operations to be canceled. Isn't it possible to make calls in parallel even if there are only two? (https://api.tmdb.org/4/list/000000)