Hi @trishmalloy ,
Could you please share a bit more about the 'Client Workout' data source? Is it a SP List?
Is the 'Client Name' a LookUp type column in your 'Client Workout' data source?
Based on the formula you provided, I have made a test, and the issue is confirmed on my side. When using Id value from the LookUp field as filter value within the Filter function, the Delegation warning issue would show up. It is an known issue with LookUp field.
As an fixed solution, please consider use Value property from the LookUp field as filtered value within the Filter function. Please consider modify your formula as below:
Filter('Client Workout', 'Client Name'.Value = Gallery2.Selected.ReferencedColumn)
Note: I assume that the 'Client Name' field references values from the ReferencedColumn within your another SP List the Gallery2 connects to.
Please consider take a try with above solution, check if the issue is solved.
Best regards,
