Hi,
It looks like my latest update within the branch 8.8.15 (now it is 8.8.15_GA_4059.FOSS) broke some IMAP mail handling. A week ago one customer opened an issue, saying that some of definitelly read mail from some weeks ago suddenly re-appeared as un-read. Ok, as noone else reported such an issue, I put a blame on MS Outlook 2016, which he was using at the time.
But today some others observed the smae issue, including me. I can see hundreds of deleted mail again in my inbox, and all mail is marked as un-read. By quickly analyzing by-my-memory, I guess the issue ragrads to all mail, which I read and deleted on my smartphone (Android 11 with native Mail app ver. 6.1.42)
Anyone had the same problems?
Not even sure how to approach debugging.