Hi
The connector in Power BI Desktop to connect to Google Analytics rely on the Google Analytics Core Reporting API. The API may change in a way that affects the results of the queries we generate. You can see: Third-party service: Google Analytics connector for Power BI Desktop.
In your scenario, please try to use the latest Power BI desktop version. Besides, as the issue is more related to data which is exported from Google Analytics. According to this article, this should be a better place for you mainly discussing questions related to google-analytics-api.
Best Regards,
Qiuyun Yu