The underlying Provider connection was lost (JCE provider 5.11.0 )

I'm encountering an issue where I'm unable to retrieve keys intermittently. The error message states: "Failed to retrieve key: The underlying Provider connection was lost: Communication with the device was lost during the execution of the function." It appears to happen randomly and inconsistently.
I am running a cluster containing two HSMs. In my java application, the provider is initialized properly using system properties provided credentials .
What could be the reason ?

Start with the reported key-retrieval error and the Java provider initialization using system-property credentials. Compare the behavior across both HSMs in the cluster and investigate the intermittent device-communication loss. Done means identifying a reproducible cause or documented resolution for the lost provider connection.

Written by the indexing model from the issue text.