ToDo could be much more - bugs & basic features missing

mdevitt I love this app and use it every day but the sync issue drives me absolutely nuts - and I use the Edge browser as well. I complete a task and refresh the browser and about 50% of completed tasks reappear in the list as incomplete. If I add in or remove due dates, add to my day or some other attribute value seems to complete but even that is not consistent. It's like the complete tick box doesn't trigger whatever procedure is completing the tasks and you need to invoke by changing some other aspect of the task. This problem has been there now for years. I don't get how you can have basically the core function (completing tasks) of an application be so buggy and Microsoft have still not fixed it. Product team however you are prioritising work you need to change it.