I’ve again lost all configuration of K-9 Mail. This has happened for the second time in one month. Basically K-9 Mail launched as a brand new installation. Fortunately I had a backup so the only pain was to enter the passwords again for 6 IMAP accounts and change some minor settings. However, this is worrisome and I do not recall anything like that happening before the recent K9 major update this year. I’ve been using K-9 Mail for a couple of years and never had any major issues.
K-9 Mail v5.806