Non-recurring scheduled tasks did not "fire" today

Three tasks were Scheduled for today, but did not convert to Active. Please take a look at the screenshot:

It is quite unsettling - it leads to missing/forgetting planned activities!

In the forum I found instances of a similar issue, but the GTDNext team could not achieve reproduction. The three tasks remain “scheduled” in my account, and if it helps at all, you can debug using my project. Please respond with the details you need, if you do.