Time Fog

On the road to Karahai The Party encountered a strange fog. It obscured all visibility and strange voices that called to members of the party could be heard. By the time it had lifted we had not moved at all and two weeks had past (realised later). We went into it a second time.

Extending the reach of the Eternal Lantern may help.

The Great Willow told us that this fog is because we have apparently moved, but not physically. Possibly Planeshift style. LEGALLY DISTINCT!
The Great Willow also marked on our map the edges of the fog.