its normal i face this u want to close the twice after open it and log in rcs by the phone number with internet connection it will works and before login update google message.
Use sms organizer it's better to save messages and backup and restore it will work in all android devices...and no need like rcs like google messages it's like he'll one of the app it's should not consider user preference or user requirement...atleast u can use the sms organizer to use a simple msg app...
As per your query, we would request you to kindly contact your network service provider they will provide you with the exact information regarding this.
