Anomaly Detectors stopping without apparent reason

We setup 3 anomaly detectors that have been working without issue for over a week. Suddenly they now stop without a reason. They initialize correctly but after a certain period of time they stop unexpectedly. They don’t all share the same index and the indexes are working fine. No further error message beyond “Unexpected error”. OD 1.8.0. Kibana 7.7.0.

Can you run _profile API to get those detectors’ errors?