DK2NORSO in compilation scale 1:350000, and is set to display scale 1:20095 and below this it will not be displayed. 

This means that in ECDIS when you zoom in from 1,5 nm to 0,75, it wont show anything at the chart, it just turns white.

Also in this area it is stripes all over the chart.

Since there are no other cells available the screen will become grey without any ENC data.