I have a Custom Connector that is working well. It pulls data, handles pagination, and handles the Access Token expiring after 15 minutes during large calls. However, I have an issue specifically with Power BI Online and using Data Gateways. When I refresh in Power BI Desktop, I can make large calls and rely on the pagination and refresh of the Access Token after 15 minutes. However, Power BI Online behaves differently. Power BI Online will start by Refreshing the tokens (as expected), then it will grab data and paginate for 15 minutes (all as expected). After 15 minutes, it hits 401 Unauthorized errors as the Access Token has expired (once again, still working as designed). Where Power BI Desktop is smart enough to just run the Refresh function and continue where it left off, I can see that Power BI Online never attempts to run the Refresh function. Instead, it just fails the query and returns the Invalid User Credential error.
Has anyone ran into this issue before? All testing, debugging, and even live environment using Power BI Desktop work fine along with any queries using Power BI Online that happen to be under the 15 minute expiration time. It's only the detection and use of the Refresh function in the middle of queries that is having an issue. I have found this issue is for both the Personal Data Gateway and the Enterprise Data Gateway.
