Immutables Criteria for MongoDB seems to have a bug, when you try to find a document with an element inside a nested collection that matches multiple conditions. For example:

person.pets.any()
  .with(pet -> pet.name.is("fluffy").and(pet.type.is(Pet.PetType.gecko)))

Executing such a criterion against an in-memory backend works.
However, running such a criterion against a mongo backend fails with an error like:

ImmutableCall{EQUAL path=getName constant=fluffy} is not a path
java.lang.IllegalArgumentException: ImmutableCall{EQUAL path=getName constant=fluffy} is not a path