Scheduled runs just disappearing

I have a summer schedule. It is a fixed one running on Wednesday and Saturdays but has weather intelligence enabled.

Until a few weeks ago, everything was working and it would either run a zone or the calendar would sure that it was skipped.

Now since a few weeks ago it stopped doing that. The schedule is still there and I can see the upcoming runs in the calendar but the runs are not exercising and there is nothing in the calendar about they not running. They simply do not show in past runs at all (not even as skipped). In fact it was supposed to run this morning and until yesterday night I could see the run scheduled. This morning it again simply disappeared.

I manually run the schedule and this worked fine.

Any ideas about what might be happening here?