Apps like whatsapp, cisco webex, google class room, etc automatically uninstalled from my andriod devices. I was using initially Samsung Tab S3 Andriod Version 9 which was running smooth until issues started in the month of Dec-2020 onward. Hence, i purchased new mobile (Oppo F17, Andriod Version 10) in Feb-2021 and similar issues started in new mobile as well. Even, I did flashing of mobile and tab & changed the internet service provider and router as well but still issue continues. Please advise to fix the issues.