I just found that the PST format specification is documented to view freely in Microsoft's site, here: https://learn.microsoft.com/en-us/openspecs/office_file_formats/ms-pst/141923d5-15ab-4ef1-a524-6dce75aae546I think that would be a huge help for a ...
It seems to me, like even when the task is configured as repetitive, it won't show again if it's marked as "completed". So, maybe the task that is created on the repetition date (if that's how it works internally) is inheriting the completed status. ...