If you haven't done so already, would it be possible to submit a Tasks & Lists issue report via our support system?

Please select the issue that you're experiencing from the list on the left, and follow the steps shown. If your issue isn't listed, just click on "I'd like to report a new issue" on the left.

Your report should provide all the info that we need to investigate further, but we'll be in touch via email if we require any more details.

Thanks!

Why not just complete it and have it be gone?

It would still show as a task in the all tasks list and in my complete tasks smartlist. I delete a lot of tasks that I don't need to keep a record of having done. I don't want them cluttering things. It would be simple to add a delete task option on the mobile web interface on the same page as the complete and postpone buttons.