The same problem also happens with 5.0.2

Steps to reproduce:

• Numeric Database field (smallint or similar)
• JPA 2.1 Converter that converts this to boolean (0=>false, 1=>true)
• Write JPQL where property is contained as literal "from xyz where property=true"

Note: The same JPQL works when providing the boolean as parameter (i.e. "from xyz where property=?1")