Table.Buffer() function wrong data with no errors on refresh

[IvanRy]

Hello!
I encountered an interesting behavior, when I used Table.Buffer function in middle query, refresh all done without errors on OnPrem Server and on local PC also, but data is incorrect (like part of data is ommited), but after remove Table.Buffer step refresh lasts longer and data is correct (with a new portion). Could somebody explain what can be the issue?

[v-xinruzhu-msft]

Hi @IvanRy 

Please consider the following points:

1.If data is large, please consider to simplify your data and data structure, you can refer to the following link.

Optimization guide for Power BI - Power BI | Microsoft Learn

2.Please check your each step of transfrom, if the step is too complex, please simplify the step. it may also affect the result.

If these suggestion cannot meet your requirement, can you provide some more detail information about your problem?

Best Regards!

Yolo Zhu

If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.

[lbendlin]

show a sanitized version of your code.