Tasks Disappearing after Escalation

Certified Senior Developer

We've seen at least 2 occurrences where a user's task has disappeared before being completed. In the most recent case (yesterday), a task was assigned to a user but was not completed within the timeline associated with the escalation configured on this node. The user received an email after 4 days; then another user received one after 7 days alerting him of the incomplete task. Over a month has gone by since that last alert was received and the user realized the task hadn't been completed so he tried to find it and it was no longer displayed in his queue. I opened the process and there were no errors. The process was stalled on this node (task assigned to this user). I was able to resolve the situation by 'viewing the form' and reassigning it to the user (group), at which time it displayed in his task list and he was able to complete the task.  Is there some sort of deadline associated with uncompleted tasks (perhaps those that have escalations) that removes them from the users' task list? I can't figure out why it disappeared. I read one case where this happened when the process was 'edited' and the task disappeared, but I don't believe this was the case.  I did not document what happened the first time we saw this occur but I believe I just restarted the node and then canceled the outstanding task. Viewing the form and reassigning it seemed to work better - but still curious as to why it occurred in the first place. Any suggestions on what may have caused this?

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