When starting a significant number of Cluster nodes (>10) in CUBE CE (v6.5), the cluster nodes might fail to start, or take a significant amount of time, or hang up. This issue is related to how Cluster nodes use the new Bentley CONNECT licensing when they are opened. After a node is opened, it should function without any issues. Below is a solution to avoid the issue with opening Cluster nodes.
This will make sure that the licenses are locally served and CONNECTION Client is not communicating with our license server which seems to cause the issue. After the checkout period expires, repeat the process to checkout the license for additional time.