I also got couple of LUD changes last week, from "case transferred" to "case pending" with the final LUD on my I-485 saying "document sent to the address on file on August 21" but my wife's message changed to "case pending" from the "case transferred". I received two letters about my address change , one for me dated August 14 and one for my wife dated August 20.
Did anyone of you also receive letters for address change?