Has anyone traveled internationally with an I-551 stamp or know of anyone who has recently traveled with it? One of my siblings has their I-485 approved in October 2022 and still waiting for a physical greencard (tried everything from calling USCIS, to House Rep etc.). They have a copy of their I-485 approval notice and an I-551 stamp on their passport that expires January 2024. Should they have any issues traveling abroad and returning to the US?