When the search radius set in the preferences does not overlap with the mapped area, an empty surrounding search is the result.
After that, it is possible to press the softkeys and choose from the menu, but no item is opened / LoroDux is not closed.
Only known workaround is restarting the phone.
Expected behaviour:
The surrounding search shall not be limited to a radius but to a number of objects instead, so this can not appear.
When there is no map loaded or the map file is empty, there shall be an appropriate error message and the application shall stay functional.