IoT Core Rule SQL - Why doesn't the AWS IoT SQL WHERE clause work with many fields when using the OR operator?

ex: I have a SQL query: select * from 'iot/+/noti' where a = 0 OR b = 0 OR c = 0

• when i publish { "timestamp": 123, "a": 0} => OK, i see iot log { "timestamp": 123, "a": 0}
• when i publish { "timestamp": 123, "b": 0} => NG, i don't see iot log
• when i publish { "timestamp": 123, "c": 0} => NG, i don't see iot log

Please help me ! Where is the error in my SQL statement ? Note: SQL version: 2016-03-23