I am having the exact same problems with GTA Unattended on Mojave for my existing clients. Rescue Assist is not a viable replacement to GoToAssist. RA does not work on Android's Chrome 79.x nor Firefox 68.x or higher, so it's impossible for me to start remote expert sessions from my mobile devices, as RA unattended computers do not show up in the GoToAssist Android app.
And all the Reporting information I need for billing my clients is missing/invalid in all reports types including XLS. The fields missing valid data are Company Name, Techician Host Name, Technician Notes, Accounting Info, and all IP address info. The RA web console is not a solution to this problem. Fix the GoToAssist product that we all pay for!