When Herald acts on an object (by, e.g., adding reviewers or changing the owner) the change should be reflected in the object's transaction log and attributed to the appropriate Herald rule.
Original Description
We have been running Phabricator for quite a while now.
Lately we noticed that we are unable to claim/re-assign tasks. While a notification is sent out (email) and a comment begins to show up in the bug's history, the task remains assigned to the previous person.
We tried upgrading to the latest version of Maniphest/Phab but to no avail. Any ideas about how to debug this further?