But when RF looks up the current value to compare, it will always be null because the regular lookup doesn't set the transient value.
RF expects a correctly filled entity after loading it from the DB using the entity locator methods (because RF only sends changed data). It's your job to provide a correctly filled entity. You must update your entity locator method to fill the @Transient field or you have to use JPA @PostLoad to "automatically" fill the @Transient field once the entity has been loaded from DB.
Otherwise use a ValueProxy as it does not has a DB identity and thus all values will be send by the client.
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