trying to log HC0047, is it normal that it does not trigger neither ExecutionDiagnosticEventListener.ValidationErrors nor IErrorFilter.OnError() ?

[Cfun1]

I have also tried to override OperationCost(IRequestContext context, double fieldCost, double typeCost) but at that point the validation error .HasErrors flag is false.
My goal is to catch and log for debugging during development the "HC0047" error.
It is weird unless I am doing something wrong that the IErrorFilter implementation is not triggered for this error code. Any advice is appreciated, thank you.

I can see a work around having the max costs as const and compare inside OperationCost() and log if greater but I don't think it's a elegant approach more like a workaround if I don't have any other option.