Messages Check in Dev Beta vs Public Beta

Does anyone know if the check in feature of messages works for public beta? Im running dev beta 3, a friend has public beta 1 running of 17. She can send me a check in, but when I try to send her a check in, it says Check In is not available to send to this recipient. I have my location services on for messages, she did not, but does now, but I still cant send one to her