We cannot seem to replicate this. Are you sure that the filter used is affected?

No, I'm not sure that multiple projects filters are the reason for the missbehaviour. Having included multiple projects in the filter is the only property that the faulty cards have in common from my point of view. But the problem might also come from the same reason as the exceptions that we get in planner; see my other question here. Maybe you can have a look at it as well while checking our database, as offered in the other question. I will add a remark to this additional problem in my email.