Due Dates & List Labels Not Sticking

I've started using ActiveInbox the end of 2017. It's been working beautifully and I love it!

Last week it started with this exact bug. I change the due date, it disappears from the list only to pop back again seconds later. I change the due date again and it moves properly to the next day.

What is the fix?

Note: This conversation was created from a reply on: My updated statuses and due dates are not sticking..
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