Voyager is encountering a spatial distortion in the shape of a ring, which the crew can't figure out how to escape. In space, though, they have the option of movement in all three dimensions, so they could have merely moved the ship along the z-axis in order to evade the distortion. It would have been better to have the distortion in the shape of a hollow sphere.
When B Elanna Torres is entering the transporter room (in hopes of finding engineering) you can see a door to the left which is actually a part of the engineering section. However once B Elanna is in the transporter room, the door disappears. Ordinarily, this would be considered a continuity error, but since we are explicitly told that the phenomenon that the ship has encountered is continuously rearranging the layout of the ship, we may assume that the door's disappearance was caused by the phenomenon.