How to break rxjs 6 version chain execution?

Question

Angular

Good day to all.
The crux of the matter: previously, the syntax for sequential calls to the server could be formatted like this:

this._someService.someMethod()
  .concatMap(...)
  .concatMap(...)
  ...
  .subscribe(...);

and if, for example, an error occurred in the second call, then all subsequent ones were canceled.
Now the syntax is:

this._someService.someMethod()
  .pipe(
    concatMap(...),
    concatMap(...),
    ...
  ).subscribe(...);

And now if an error occurs in one of the initial calls, then all subsequent calls still work, how to return the behavior with the cancellation of subsequent calls?