Aliens continuity error? [spoilers]

In Alien Director's Cut, Ripley comes across a hive with Dallas and Brett hung up. In Aliens the marines come across the same hive like formation leading to the burial chamber, but when asked what it is, Ripley replies that she doesn't know.

Is this because her encounter with this area isn't in the theatrial cut of Alien? Or she doesn't remember because of hypersleep?