See the attached screenshot.
The level I am currently on has only one layer I think.
The nearby level with two layers is only shown with one-layer view as long as I
am on the level with only one layer
When I switch over to that level, it is displayed fine.
r4955
title: if current level has 1 layer, nerby levels with multiple layers are shown wrong -> if current level has 1 layer, nearby levels with multiple layers are shown wrong