I am creating app which communicate with ESP32. So in first everything was okey and app worked, but after installed new android 10 security patch 2020 02 update, suddenly app won’t communicate at all. I am using Oneplus 6 phone. So I suspect that new security patch does’t allow to communicate with BLE extension 20181124 version. The older phone with older android can communicate without any problems.
I guess you have the same problem.