I've experienced a similar issue with my MongoDB cluster on MongoDB Atlas.

"Quiesce" mode indicates that a node in the cluster is shutting down, usually as part of maintenance, updates, or optimizations by the service provider. This is a routine process where the node is replaced with a new one.

It's nothing major, but I recommend scheduling your cron jobs just before or after midnight, as most providers perform maintenance around that time.(Factor in the time zone of your cluster)

Also know that "Quiesce" will trigger connection to MongoDB exceptions too.

NB: you may still see this error but it shouldn't affect your job anymore.