So the doveadm search itself succeeds without errors, but if you immediately do another doveadm search it fails? Or do you need to do something else also in the middle? I couldn't reproduce this with a few tests.
Is there any way to produce debug logs that will show what goes wrong. It is consistent in such a way that I will have several errors within a 24 hour period.
I will be willing to add code and rebuild dovecot to produce the logs you need.
Best regards Henrik Larsson
