Catch error in combined pipe of pipeable rxjs operators

After refactoring you moved map out of switchMap projection, so any error will close the outer stream. To keep both streams equivalent, you need to use pipe in the projection itself like that:

import { EMPTY } from 'rxjs';

// ...

@Effect()
loadData$ = this.actions$
.ofType(LOAD_DATA)
.pipe(
  map((action: LoadData) => action.payload),
  withLatestFrom(this.store.select(getCultureCode)),
  switchMap(([payload, cultureCode]) =>
    this.dataService.loadData(payload, cultureCode)
      .pipe(
         map(result => {
           if (!result) {
             return new LoadDataFailed('Could not fetch data!');
           } else {
             return new LoadDataSuccessful(result);
           }
          }),
         catchError((err, caught) => {
           return EMPTY;
         })
      )
  )
);