I also experienced the 'Array Stopped...Starting Services' message in RC4. If I disabled or enabled either Dockers or VMs in settings then the status would immediately go to 'Array Started' as soon as I selected either option. Since re-creating the docker and libvirt image files, I no longer see this issue. Even when I had the issue with the Array Stopped message, all of my dockers, vms and array operated as normal.