Ingres as source - Query with LOCATE causing stackoverflow error

EDS Query Testing is getting unexpected results on 16 queries involving LOCATE. A couple examples queries are given below:

SELECT INTKEY, LOCATE(1, STRINGNUM) FROM BQT1.SmallA ORDER BY intkey (Expected 50 records but received only 0)
Remote org.teiid.core.TeiidProcessingException: Source: null
see stackoverflow.log attached

SELECT INTKEY FROM BQT1.SmallA WHERE LOCATE(1, INTKEY) = 1 ORDER BY INTKEY
Remote org.teiid.core.TeiidProcessingException: Source: null
Is also a stackoverflow error.