NOT IS_EXTERNAL IN (1)
IS_EXTERNAL contains <null> values.
To get snapping to work again you need to:
- add a second rule which deals with <null> values (e.g. : IS_EXTERNAL NULL)
- set colours for the symbol used in the second rule to "none" (symbol will not be drawn)
- move rule on lowest position in style-editor.
|...by fiddling around with thematic rules.|
The exact circumstances of the causes of the issue are not known to me.
Map 2013, SP2