Fixed in upstream 2.3.9.3: https://dovecot.org/pipermail/dovecot-news/2020-February/000430.html https://dovecot.org/pipermail/dovecot-news/2020-February/000431.html
Hi Hanno, thank you for reporting. Check here please: https://bugs.gentoo.org/709386
*** This bug has been marked as a duplicate of bug 709386 ***