Graph API Groups Delta Query Never Returns Delta Query - Infinite loop with nextLink

I am encountering an issue with the Microsoft Graph API's group delta query usually for large directories. We are using the group delta query to track changes in groups and their memberships. The process of following the @odata.nextLink to get all the data until we receive an @odata.deltaLink can take half an hour to couple of hours to complete (or until some timeout).

We've observed that some pages return results with data, while others return empty pages, but the @odata.deltaLink is never returned, preventing us from stopping the process in an expected way.

1. Is this a known issue?
2. Is it a viable workaround to stop after a certain number of iterations (e.g., 50), save the @odata.nextLink, and then resume the process from that link a few minutes later?