Plugin registry starting up takes a lot of time since all plugins are added at runtime.
That's why readiness/liveness probes might fail sometimes.

Solution:
Allow to configure readiness/liveness probes

Alternative solution:
Operator can automatically update probes if deployment keep failing

Alternative solution:
Operator shouldn't revert changes in probes configurations

Workaround:

1. Update CheCluster CR:spec:
  componenets:
    pluginRegistries:
      disableInternalRegistry: true
      externalPluginRegistries:
        - url: https://<YOU_DEVSPACES_HOST>/plugin-registry/v3
...
2. Now you can update plugin-registry deployment to tweak readiness probe
3. Wait until plugin registry is started

Thread: https://chat.google.com/room/AAAAm3qdpQU/v7ODVSUESrg