Geometry that is hidden in a layer, becomes visible after being moved in the viewport. The layer stays hidden, and if a cube is placed in the layer, it also remains hidden. Moving a cube that is hidden in the layer, does not cause the Geometry brushes to appear either
Also, all Geometry brushes become visible even if it is hidden in a separate layer.
This happens in 4.14.3 - 4.16 so there is no regression here.
Result: All Geometry becomes visible in the viewport
Expected Result: The Geometry brush is moved, but remains hidden
There's no existing public thread on this issue, so head over toAnswerHub just mention UE-42542 in the post.