Hi @Sawanya_W delegation warnings mean that once the row limit for your application has been hit this will no longer pull from the data source the Data row limit can be found in the settings of the canvas app:
This can be set to a maximum of 2000 Items so if your application will never exceeds this item limit then you will be fine but if the application will exceed 2000 items (Assuming you have this Data row limit set to 2000) then this will then cause you issues with not collecting the 2001 etc item in your list.
I would recommend always setting this to 1 when editing as then you will clearly see when a delegation issue will arise in the future!
Starts with is a None delegable Function unfortunately! So you will always get this waring when using this in your filter when your using a nondelegable data source like SharePoint. You could try moving to a delegable Data source which would be Dataverse or try a batch loading process using Power Automate to pass your data to the Canvas App in to a collection.
For more info on Delegation:
https://learn.microsoft.com/en-us/power-apps/maker/canvas-apps/delegation-overview
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Thanks
Andrew
