https://thenextweb.com/security/2019/09/12/telegram-fixed-a-bug-that-stored-images-on-recipients-phones-even-after-you-unsent-them/
https://thenextweb.com/security/2019/09/12/telegram-fixed-a-bug-that-stored-images-on-recipients-phones-even-after-you-unsent-them/