> even though the update to the DynamicSource software had been tested over an extended period, the bug was missed because it only presented when many aircraft at the same time were using the system.

Errrr what?

How do you even get this type of bug?! These scare me more than just a calculation error

Edit: on second thought this looks more like of some race condition on inputting the data, or maybe some query that fails and gets replaced by a 0