There is a bug in the normalizeFilter function.

expression = {
                    logic: "and",
                    filters: isArray(expression) ? expression : [expression]
                }

The logic option is hardcoded, so it won't use the value you submit using the datasource.query() function.

Example:
dataSource.query(
{
    logic: "or",
    filter: [
       { field: "indicator", operator: "contains", value: '0.a' },
	{ field: "indicator", operator: "contains", value: '1.a' }
    ]
} 
)