missing foals (not broodmare related)

I'm missing a lot of foals today. I don't know how many exactly, but none of the mares gave birth even though they progressed, and none of them are expecting anymore.
Their foal count also has not changed, but the other counter has and right now says that the mares where last bred 5 days ago.

Many of these foals have been found and issues resolved if you are still experiencing this issue please go to Missing/Late Foals Bug Masterpost to give us more information. This post is linked there as a history but please use the new post to give us new information. Thank you!