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Using one linked dataflow source to filter another linked dataflow source produces buggy operation.

Hi there,


I am using two dataflow data sources (A1&A2) in a second dataflow (B), where using A1 to filter A2 as part of transformation , it produced prelonged and buggy result in terms of saving the second dataflow and refreshing turnover.  However if I change A1 to the original direct datasource (which is sharepoint Online) , it produces much faster and stabler result. Does anyone know if it's an exisiting issue with how dataflow engine works or is there any remedical approach i can adopt? 


I prefer using one orignal data source in one dataflow, and using dataflow as the data sources in the following dataflow, which is easier to control source data. 


 Thanks in advance.

Community Support
Community Support

Hi @VeraInSydney ,


Could you please provide more details about your error message and prelonged result? What is the datasource of A2?

Besides, here are some Documents about Dataflow. Please check if these could help you a little.

Dataflows Limitations, restrictions and supported connectors and features - Power BI | Microsoft Lea...

Dataflows best practices - Power BI | Microsoft Learn

Optimize Power Query when expanding table columns - Power Query | Microsoft Learn


Best Regards,

Jianbo Li

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