Bug with exists queries

[berickus]

I have a query in my repo:
boolean existsByReferenceUuid(UUID referenceUuid);

According to the documentation this should work, but when using it I retrieve this:
java.lang.ClassCastException: my.program.MyClass incompatible with java.lang.Boolean

This is my repo config:
public interface MyClassRepository extends RedisDocumentRepository<MyClass, UUID>