Overlay map gone

After entering the Feeding Trough, the overlay map didn't show anymore.



You can see the orange entrance on the overlay, but that was it (just below my character).

At some places in the area it showed briefly, but it was not the location that did it (returning to the spot did not reveal the overlay map again).

After completing Kitava and entering Oriath, the overlay map was back and did not vanish again.

Bug number in the screenshot: 3.084.340.371