After declaration of a standard world map zoom level 11 remains void
Locus 3.31.1 - maybe the problem is already older.
I have defined overlay of maps as suggested on locus help pages. Overlay is a world map "World-1-10-tr-11-OAM.sqlitedb". This map has a transparent level 11. Everthing works well.
Now I found a configuration in maps | configuration | Offline Maps | Define a standard map with the explanation: With this definition the zoom behavior of vector maps is improved. The configuration was inactive.
Because I did not know .. maybe it is better to declare one .. I configured here my world map above. For the first moment I did not perceived any changes in behavior.
But after some days I realized that zoom level 11 remains void. Only the shaddowing is illustrated. On my second locus on tablet everything was ok. So I tried to remember what I had changed.