Thanks @Kaniz Fatma​ for your answer!

Actually, we have the problem on Azure Databricks. We did not test it on AWS yet. Does that make a difference?

Also - as written in the Question - the problem happens (actually more pressing) directly in the Databricks Notebooks themselves, if a second Databricks Notebook using R is connecting to the same Cluster. This happens both in interactivice clusters as well as when several steps in a Workflow use R Notebooks with Unity Catalog.

Could you give us some pointer (in the documentation, source code ?), what AWS/Azure Credentials you mean and how we should set them up?

Best, Philipp