Steps to reproduce

1. use attached tours.yaml as hotfix for /tours/app/tours.yaml resource
2. open Tours app and select Featured option in comboBox filter

Expected results

Only tours with isFeatured flag are shown in grid

Actual results

Nothing is shown

Workaround

use custom ColumnDefinition class (see Resource app for example) or use enumDatasource with custom enumeration class

Development notes

there are two places where it can be fixed in ui codebase.

option 1) JcrQueryBuilder#withPropertyFilter:

final String value = (filterEntryValue instanceof Node) ? ((Node) filterEntryValue).getIdentifier() :
                       (filterEntryValue instanceof Option) ? ((Option) filterEntryValue).getValue() : filterEntryValue.toString().toLowerCase();

or (cleaner) option 2) provide #toString impl in info.magnolia.ui.datasource.optionlist.Option:

@Override
public String toString() {
  return getValue();
}