Entity with field interceptor are not correctly passed as Linq parameters

[cremor]

I've just updated from NHibernate 5.2.7 to 5.3.2 and now a few of my tests are failing. Some of them all have the same error where Oracle reports inconsistent datatypes for a parameter.

It looks like the affected Linq queries all pass the entities directly as a parameter, so NHibernate is responsible for extracting the Id from the object. This doesn't work any more in 5.3.x when the entity parameter type is XyzProxyForFieldInterceptor (which I think is the case if an entity with a lazy property or lazy component is loaded).

Example query:

// Person is mapped with a lazy component
Person personParameter = session.Get<Person>(123);

// Fails with Oracle error "inconsistent datatypes"
var result = Query<Customer>()
   .Where(x => x.Persons.Contains(personParameter))
   .ToArray();

The exception message contains the information Name:p1 - Value:{PersonProxyForFieldInterceptor}.
The SQL log output confirms the wrong parameter by showing something like this: :p0 = 0x0001000000FF... [Type: Object (0:0:0)]

If I change the query so that a just persisted object is used as a parameter (which isn't of type PersonProxyForFieldInterceptor but instead just of type Person) the query works correctly.