Degraded Gravity cluster for no reason

We have several Gravity clusters (test clusters, etc) that we deploy, and I would say invariably they all go into a degraded state for no discernible reason, and don’t seem to correct themselves.

In this case, here is gravity status for a 6 node cluster:

$ sudo gravity status
Cluster name:		bravemestorf2902
Cluster status:		degraded (one or more of cluster nodes are not healthy)
Application:		...
Gravity version:	6.1.39 (client) / 6.1.39 (server)
Join token:		...
Last completed operation:
    * Remove node ip-10-1-10-74.us-west-2.compute.internal (10.1.10.74)
      ID:		9affc744-d94f-46b1-a85a-a2853084a07d
      Started:		Thu Oct 15 23:14 UTC (1 hour ago)
      Completed:	Thu Oct 15 23:14 UTC (1 hour ago)
Cluster endpoints:
    * Authentication gateway:
        - 10.1.10.13:32009
    * Cluster management URL:
        - https://10.1.10.13:32009
Cluster nodes:
    Masters:
        * ip-10-1-10-13.us-west-2.compute.internal / 10.1.10.13 / master
            Status:		healthy
            Remote access:	online
    Nodes:
        * ip-10-1-10-66.us-west-2.compute.internal / 10.1.10.66 / worker
            Status:		healthy
            Remote access:	online
        * ip-10-1-10-64.us-west-2.compute.internal / 10.1.10.64 / worker
            Status:		healthy
            Remote access:	online
        * ip-10-1-10-152.us-west-2.compute.internal / 10.1.10.152 / worker
            Status:		healthy
            Remote access:	online
        * ip-10-1-10-199.us-west-2.compute.internal / 10.1.10.199 / worker
            Status:		healthy
            Remote access:	online
        * ip-10-1-10-68.us-west-2.compute.internal / 10.1.10.68 / worker
            Status:		healthy
            Remote access:	online

I can’t tell from the logs or audit log why it went into degraded state, and all the nodes report as healthy. I end up having to do a status-reset in order to restore it so I can grow the cluster.

Is there something I should be looking at to figure out what’s going on? This has happening with different versions, including 6.1.12.