Editing from a sequence loaded into the source panel

When I usually load a sequence in the source panel, select my in to out points and drop onto the timeline, that section of the sequence will appear on my timeline, like a nest would (all clips inside a greenbar with the same title as the sequence in my source panel.

When I do this on my work PC, the original clips from within that sequence (still true to the in and out points) are being dropped onto the timeline, so it's no longer like a nest but the individual clips are being dropped.
Does anyone know where I can toggle this setting on and off?