Dispite mulriple updates. . . . any time I close/reopen the app upon reopen I get a black screen. Only recourse is to uninstall . . . clear all temp files, power off and reatart then reinstall. NICE. additionally, all permissions get erased. The whole process takes about 15 minutes. Google it. Happening to lots of drivers. Your tech support was no help. I'm using an S20 Ultra with the latest updates both GH and Android.