Looping on Dataflow function causes repeated credential requests

[RandyPgh]

My project has Power BI getting Sharepoint list version history via REST API calls. Use of this community-shared function works well in the Power BI desktop and deployed dataset. Adding to this solution the "Invoke Function" button to add a new column, the function is called across a set of list items to successfully pull each item's version history. However, when I move the function and table to a dataflow, the function repeatedly asks for credentials to be entered. Any thoughts for getting to a single REST API call or for keeping the credential request to a maximum of one time?

[lbendlin]

The thread you reference has a potential solution at the very bottom, but it comes at a cost:

I found a work around. Load the data into a DataFlow first. In your Dataflow there is an Options button. In there click Project Options. Check the box "Allow combining data from multiple sources. This could expose sensitive or cofidential data to an unauthorized person.". With that set the query can now pull the data from both SharePoint and WebContent.