Hello, several times I experienced data loss when working with the agenda and doing something else then, which is yet unknown.
For instance, this morning I opened and closed a couple of tasks from the agenda view. Then I appended to the org file that holds the tasks. Maybe I saved that buffer. Maybe I did some other things next. Then I refreshed the agenda view and the tasks where untouched again, all logged state data is gone. I found a backup of the org file that clearly showed that the task's states have been switched to done 15 minutes ago. I tried to reproduce that behaviour with simple tests, but no success so far. There must be some condition, I'm not aware of yet. I know this description is very vague, but maybe you have a hint anyways? It's a bit annoying if you find open tasks, that you should have been finished a couple of days ago, and you are not sure if you forgot them or if it's just state data, that got lost ;). Regards hmw