Thanks for the workaorund, but here it doesn't work. The logs still appear:
crit dovecot
service=imap,
[email protected], ip=[xxx.xxx.xxx.xxx]. Panic: file imap-sieve-storage.c: line 216 (imap_sieve_add_mailbox_event): assertion failed: (ismt->src_box == NULL || ismt->src_box ==...